
<p>We often hear about the &#8220;nature versus nurture&#8221; debate, framing it as a battle between our genes and our environment. But in many cases it&#8217;s not a battle at all, it&#8217;s a partnership. The way our genes impact our health and traits may change depending on our environment.</p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="1024" height="684" src="http://35.88.189.111/wp-content/uploads/2022/09/GettyImages-981323210-1024x684.jpg" alt="" class="wp-image-30209" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2022/09/GettyImages-981323210-1024x684.jpg 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2022/09/GettyImages-981323210-300x200.jpg 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2022/09/GettyImages-981323210-768x513.jpg 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2022/09/GettyImages-981323210-880x587.jpg 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2022/09/GettyImages-981323210-1180x788.jpg 1180w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p>Understanding both &#8220;nature&#8221; and &#8220;nurture&#8221; is especially important when we consider complex skills critical to success in life, like reading. Thanks to the contribution of over a million 23andMe<sup>®</sup> research participants, a <a href="https://pubmed.ncbi.nlm.nih.gov/40991152/" target="_blank" rel="noreferrer noopener">new study</a>, led by scientists from the University of Edinburgh, is helping to untangle how both genes and environment work to shape literacy.</p>



<h2 class="wp-block-heading" id="h-the-reading-puzzle-nbsp">The Reading Puzzle&nbsp;</h2>



<p>Literacy is a powerful predictor of life outcomes, from education level to income. For decades, researchers have tried to understand the roles genetics and environment play in why some people learn to read and spell more easily than others.</p>



<figure class="wp-block-image alignleft size-full is-resized"><img loading="lazy" decoding="async" width="425" height="282" src="http://35.88.189.111/wp-content/uploads/2008/07/twins.jpg" alt="" class="wp-image-392" style="width:309px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2008/07/twins.jpg 425w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2008/07/twins-300x199.jpg 300w" sizes="auto, (max-width: 425px) 100vw, 425px" /></figure>



<p>Several <a href="https://pubmed.ncbi.nlm.nih.gov/23725549/" target="_blank" rel="noreferrer noopener">studies</a> of <a href="https://pubmed.ncbi.nlm.nih.gov/19076484/" target="_blank" rel="noreferrer noopener">twins</a> in the United States suggested an interaction between genes and environment. In these studies, how much influence genetics had on reading skills seemed to be higher in families with a higher socioeconomic status. In other words, genetics appeared to have a bigger impact on a child&#8217;s reading ability when they were in a more advantaged environment. This idea is called a gene-by-environment interaction.</p>



<p>However, the evidence of this gene-by-environment interaction was mixed in studies conducted in the <a href="https://pubmed.ncbi.nlm.nih.gov/19296213/" target="_blank" rel="noreferrer noopener">United Kingdom</a> and <a href="https://pubmed.ncbi.nlm.nih.gov/28832969/" target="_blank" rel="noreferrer noopener">Australia</a>. This puzzle led researchers to ask: can we use modern genetic data to test this theory in large, diverse populations?</p>



<h2 class="wp-block-heading" id="h-a-new-approach">A New Approach</h2>



<p>Researchers utilized summary statistics from a 2022 <a href="https://blog.23andme.com/articles/study-identifies-genetic-links-to-dyslexia" target="_blank" rel="noreferrer noopener">genome-wide association study (GWAS) on dyslexia</a> to construct a polygenic score—a way of estimating someone’s genetic tendency toward a trait by adding up the small effects of thousands of DNA differences.</p>



<p>The team then applied this polygenic score to two large groups of children and adolescents in Australia and the United Kingdom to see if the score&#8217;s effect on reading and spelling skills was moderated by their family&#8217;s socioeconomic status. Socioeconomic status was used as a broad measure of environmental advantage, capturing factors like parental education level and household income.&nbsp;</p>



<h2 class="wp-block-heading" id="h-what-was-discovered-two-parallel-paths">What Was Discovered: Two Parallel Paths</h2>



<p>Both the dyslexia polygenic score (nature) and socioeconomic status (nurture) were significant predictors of reading and spelling performance. Together, demographic, genetic, and socioeconomic factors explained between 8% and 11.6% of the variation in reading skills.</p>



<p>However, the study found no interaction effect. Nature and nurture were both important, but they worked in parallel.</p>



<p>This means the influence of a person&#8217;s genetic predisposition was the same, regardless of their family&#8217;s socioeconomic background. In these groups, a higher genetic predisposition for reading provided a similar boost to children from all socioeconomic backgrounds.&nbsp;</p>



<h2 class="wp-block-heading" id="h-the-bigger-picture">The Bigger Picture</h2>



<p>This finding is an important reminder to scientists to consider different environments when looking for gene-by-environment interactions. While some earlier US-based studies suggested an interaction, the different environments in these large UK and Australian groups showed a different outcome. Suggesting that both our genes and our environment make their own distinct contributions to the development of this fundamental skill.</p>



<p>Of course, every study has its limitations. The 23andMe research participants who contributed to the original GWAS are a self-selecting group and may not be perfectly representative of the general population. Additionally, only about 5% of 23andMe research participants said they had dyslexia, which is on the lower end of the <a href="https://pubmed.ncbi.nlm.nih.gov/18652545/" target="_blank" rel="noreferrer noopener">commonly cited 5–10% range</a>.</p>



<p>Even so, this large-scale study provides a crucial piece of the puzzle, emphasizing how vital it is to test scientific findings in diverse environments to get the full story.</p>



<p></p>


Nature and Nurture: A New Look at the Genetics of Reading Ability


<p>This week the American Society of Human Genetics (ASHG) is having its <a href="https://meetings.ashg.org/event/ASHG25/home/" target="_blank" rel="noreferrer noopener">annual meeting</a> in Boston. Attending the ASHG annual meeting is about more than just presenting our work, it&#8217;s one way we are working to ensure that the 23andMe<sup>®</sup> Research Institute contributes to a healthier future for everyone.</p>



<ul class="wp-block-list">
<li><strong>Amplifying impact:</strong> Sharing our discoveries with a global audience helps our work reach those who can build upon it, accelerating the path from discovery to clinic.</li>



<li><strong>Fostering collaboration:</strong> It&#8217;s where we connect with the brightest minds in the field. These conversations spark new ideas and forge partnerships that are essential for tackling complex diseases.</li>



<li><strong>Staying on the cutting edge:</strong> Exposure to the latest technologies and unpublished data keeps our research relevant and innovative.</li>
</ul>



<h2 class="wp-block-heading" id="h-23andme-research-institute-at-ashg">23andMe Research Institute at ASHG</h2>



<p>For those attending, stop by our posters in the following sessions:</p>



<div class="wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex">
<div class="wp-block-column is-layout-flow wp-block-column-is-layout-flow" style="flex-basis:66.66%">
<p>WEDNESDAY, OCTOBER 15TH 2:30 &#8211; 4:30 PM (Posters; Board #2004W) <br><strong>Sustaining Research Ethics in Times of Change: A Framework from the 23andMe Research Program</strong></p>



<p>presented by Emily DelloRusso, Principal Regulatory Science Manager</p>
</div>



<div class="wp-block-column is-layout-flow wp-block-column-is-layout-flow" style="flex-basis:33.33%">
<figure class="wp-block-image size-large is-resized"><img loading="lazy" decoding="async" width="683" height="1024" src="http://35.88.189.111/wp-content/uploads/2025/10/image-683x1024.png" alt="" class="wp-image-34327" style="width:150px" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-683x1024.png 683w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-200x300.png 200w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-768x1152.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-587x880.png 587w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-787x1180.png 787w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image.png 1067w" sizes="auto, (max-width: 683px) 100vw, 683px" /></figure>
</div>
</div>



<div class="wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex">
<div class="wp-block-column is-layout-flow wp-block-column-is-layout-flow" style="flex-basis:66.66%">
<p id="block-e05b9433-cb70-4375-8c5a-ad9bb51dafb9">THURSDAY, OCTOBER 16TH 2:30 &#8211; 4:30 PM (Posters; Board #2035T)<br><strong>Explore23: a privacy-forward, secure, extensible, and easy-to-use web application for exploration of a large genomic research cohort</strong></p>



<p id="block-e05b9433-cb70-4375-8c5a-ad9bb51dafb9">presented by Julie Granka, Director, Statistical Genetics</p>
</div>



<div class="wp-block-column is-layout-flow wp-block-column-is-layout-flow" style="flex-basis:33.33%">
<figure class="wp-block-image size-large is-resized"><img loading="lazy" decoding="async" width="819" height="1024" src="http://35.88.189.111/wp-content/uploads/2025/10/image-1-819x1024.png" alt="" class="wp-image-34328" style="width:150px" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-1-819x1024.png 819w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-1-240x300.png 240w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-1-768x960.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-1-704x880.png 704w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-1-944x1180.png 944w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-1.png 1280w" sizes="auto, (max-width: 819px) 100vw, 819px" /></figure>
</div>
</div>



<div class="wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex">
<div class="wp-block-column is-layout-flow wp-block-column-is-layout-flow" style="flex-basis:66.66%">
<p>FRIDAY, OCTOBER 17TH 2:30 &#8211; 4:30 PM (Posters; Board #3014F)<br><strong>Learning about a genetic predisposition to depression is psychologically well tolerated among those with high polygenic risk scores</strong></p>



<p>presented by Rebecca Berns, Sr. Product Scientist I, Genomic Health and Sciences</p>
</div>



<div class="wp-block-column is-layout-flow wp-block-column-is-layout-flow" style="flex-basis:33.33%">
<figure class="wp-block-image size-large is-resized"><img loading="lazy" decoding="async" width="682" height="1024" src="http://35.88.189.111/wp-content/uploads/2025/10/image-2-682x1024.png" alt="" class="wp-image-34329" style="width:150px" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-2-682x1024.png 682w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-2-200x300.png 200w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-2-768x1153.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-2-586x880.png 586w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-2-786x1180.png 786w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-2.png 1066w" sizes="auto, (max-width: 682px) 100vw, 682px" /></figure>
</div>
</div>



<p>Interested in reading more? 23andMe has contributed to <a href="https://research.23andme.com/publications/" target="_blank" rel="noreferrer noopener">more than 300 research publications</a>.</p>



<p></p>


23andMe Research Institute Attending ASHG 2025


<p>Cannabis is already one of the most widely used drugs globally, and its use will likely grow even more as it becomes more socially accepted and legally available. For many the recreational use of cannabis poses few problems, but for as many as a third of users, it becomes problematic developing into an addiction or what scientists call cannabis use disorder. Research suggests that genetics may explain why.</p>



<h2 class="wp-block-heading" id="h-searching-the-genome-for-clues">Searching the Genome for Clues</h2>



<p>In collaboration with 23andMe Research Institute, researchers at the University of California, San Diego <a href="https://www.nature.com/articles/s41380-025-03219-2" target="_blank" rel="noreferrer noopener">published a study</a> today that found genetic links to cannabis use as well as links to psychiatric, cognitive, and physical health. The researchers used data from more than 130,000 people who consented to participate in 23andMe research. Participants answered survey questions on whether they had ever used cannabis (“lifetime use”) and, for those who had, how often they used it during their heaviest 30-day period (“frequency of use”). The team then conducted genome-wide association studies searching for genetic variants linked to ever trying cannabis and how often people used the drug.</p>



<h2 class="wp-block-heading" id="h-what-the-data-revealed">What the Data Revealed</h2>



<p>Researchers found that having ever used cannabis was associated with two genetic regions: <strong><em>CADM2</em></strong>—a gene <a href="https://blog.23andme.com/articles/scientists-identify-genes-associated-with-cannabis-use" target="_blank" rel="noreferrer noopener">previously linked</a> to cannabis and other substance use, impulsivity, and risk-taking—and <strong><em>GRM3</em></strong>. While GRM3 has been tied to alcohol use, schizophrenia, and certain personality traits, this is the first time it’s been linked to cannabis use. How often someone used cannabis was associated with a different variant also near <em>CADM2</em>, strengthening this gene’s role in cannabis behaviors.<br><br>Both having ever used cannabis and how frequently someone used cannabis were genetically linked to other substance use, pain, and psychiatric conditions like depression. Researchers also created <strong>polygenic scores</strong>—which tally the effects of many different genetic variants—to estimate both the likelihood of ever having used cannabis and the frequency of cannabis use. These polygenic scores were able to replicate associations between cannabis use and substance use and mood disorders in two other independent research datasets (All of Us and BioVU). The researchers also uncovered novel associations with anxiety, celiac disease, HIV, and viral hepatitis.</p>



<h2 class="wp-block-heading" id="h-why-this-research-matters">Why This Research Matters</h2>



<p>Most genetic research on cannabis has focused on two points in the spectrum: first use and cannabis use disorder. But the stages in between—like how often someone uses cannabis—are just as important. Studying these “pre-addiction” traits may help determine who is more likely to progress from a casual user to someone with cannabis use disorder. This study was one of the first genome wide association studies to look at traits that may lead to cannabis use disorder.&nbsp;</p>



<p>Traits like frequency of cannabis use can reveal genetic factors that shape vulnerability before addiction develops. Understanding these factors could eventually help predict risk for cannabis use disorder and related health conditions.</p>



<h2 class="wp-block-heading" id="h-more-than-just-dna">More Than Just DNA</h2>



<p>Like all research there are some important considerations to keep in mind for this study:</p>



<ul class="wp-block-list">
<li>While this research focused on genetics, many non-genetic factors may also play a significant role in a person&#8217;s likelihood of using cannabis or developing cannabis use disorder.</li>



<li>The study was conducted in people of European descent (based on an analysis of their local genetic ancestry), so the findings may not fully apply to people of other ancestries.</li>



<li>The measure of frequency (use days in a 30-day window) of using cannabis doesn’t capture full patterns such as the duration of regular use or quantity consumed.</li>



<li>While <em>GRM3</em> is a promising lead, more work is needed to understand how the genetic variant in this region affects cannabis use biology.</li>
</ul>



<h2 class="wp-block-heading" id="h-the-road-ahead">The Road Ahead</h2>



<p>Future research will need to expand to larger and more diverse cohorts and include other cannabis-related traits such as craving, withdrawal, and response to cannabis. Combining genetic insights from multiple stages of cannabis use could:</p>



<ul class="wp-block-list">
<li>Improve the discovery of new genetic variants</li>



<li>Help build predictive models for problematic use</li>



<li>Clarify how cannabis genetics intersect with physical and mental health</li>
</ul>



<p><strong>Takeaway:</strong> Studying genetic influences on early cannabis use behaviors could eventually help predict risk for cannabis use disorder and related health conditions, and may help shed light on who is most at risk for cannabis use disorder.&nbsp; These findings mark an important step toward understanding the genetics of cannabis use and its health consequences.</p>


New Genetic Insights Into Cannabis Use


<h6 class="wp-block-heading" id="h-a-new-study-may-help-identify-and-more-quickly-help-the-60-of-people-with-major-depression-who-do-not-get-relief-from-their-initial-treatments">A new study may help identify and more quickly help the 60% of people with major depression who do not get relief from their initial treatments<strong>. </strong></h6>



<p>It is estimated that 60% of patients with major depressive disorder don&#8217;t find relief from their first medication, and as many as one-third develop <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC10503923/" target="_blank" rel="noreferrer noopener">treatment-resistant depression</a>, which is often defined as still experiencing symptoms after trying at least two antidepressants.</p>



<p>Researchers at Johnson &amp; Johnson and the 23andMe Research Institute used advanced machine learning techniques to accurately identify those at most risk for treatment-resistant depression, a massive breakthrough for those suffering with this condition.</p>



<p>The groundbreaking research, published this week in the journal <a href="https://pubmed.ncbi.nlm.nih.gov/41028019/" target="_blank" rel="noreferrer noopener"><em>Scientific Reports</em></a>, used only self-reported information from about 23,000 people who consented to participate in 23andMe research. The model included a total of 101 predictive factors, including such things as age, symptoms that persist between episodes of depression, the duration of episodes of depression, stress levels, and suicidal thoughts. </p>



<p>Using this predictive model, researchers were able to accurately predict those at the highest risk for treatment-resistant depression 78% of the time, according to the study.&nbsp;</p>



<p>The predictive model did not use either genetics or lab results, just questions that can be easily assessed by a clinician.</p>



<h2 class="wp-block-heading">Why This Matters</h2>



<figure class="wp-block-image alignright size-full is-resized"><img loading="lazy" decoding="async" width="508" height="531" src="http://35.88.189.111/wp-content/uploads/2025/10/drug-bottle.png" alt="" class="wp-image-34304" style="width:161px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/drug-bottle.png 508w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/drug-bottle-287x300.png 287w" sizes="auto, (max-width: 508px) 100vw, 508px" /></figure>



<p>Typically, antidepressants used to treat major depression take a little time to work, up to a month or a month and a half. When a treatment does not work, clinicians often prescribe an alternative medication. When someone with depression fails to respond to at least two different medications, they are deemed to have treatment-resistant depression. In many cases, it can take around a year for someone to finally be diagnosed with treatment-resistant depression.</p>



<p>That long delay in finding effective treatment has a cost, not just in the time it takes to identify treatment but in the prolonged suffering for those in the throes of depression, unable to get relief.&nbsp;</p>



<p>The promise of the kind of predictive modeling described in this new study is that it would give both people with depression and clinicians who treat them a tool to flag those who might not respond to standard therapies.</p>



<p>Instead of waiting to see if initial treatments are effective, it may accelerate the process of finding alternatives. Additionally, this predictive model only utilizes patient-reported information; no expensive testing is required.&nbsp;</p>



<h2 class="wp-block-heading">More About the Predictive Model</h2>



<p>The model identified eight primary factors that predict treatment resistance, as reported by research participants. Each offers different dimensions of their depression.</p>



<figure class="wp-block-image alignleft size-full is-resized"><img loading="lazy" decoding="async" width="275" height="252" src="http://35.88.189.111/wp-content/uploads/2025/10/depression.png" alt="" class="wp-image-34307" style="width:184px;height:auto"/></figure>



<p>Participants reported on the different symptoms that persisted between the episodes of depression. They reported on how long each episode of depression lasted, and how many years they&#8217;d experienced these periodic episodes. Also included in the self-reported data were levels of stress, or whether they had recurring post-traumatic stress, and two critical factors that looked at more external stressors and life events. Also factored into the modeling was a participant&#8217;s age and whether they had suicidal thoughts. Finally, the model included the self-reported timing between episodes of depression, which was significant when the time between episodes was shorter.</p>



<p>Using these factors and advanced machine learning the researchers were able to accurately distinguish between those who were treatment-resistant and those who responded to treatment. An accurate way to identify if someone will or will not respond to treatment could translate into meaningful clinical benefits. It could mean the difference between waiting months for effective treatment instead of years.&nbsp;</p>



<h2 class="wp-block-heading">More Personalized Depression Care</h2>



<p>This research represents a crucial step toward more personalized mental health treatment and a move away from a &#8220;one-size-fits-all&#8221; approach to treatment of depression.&nbsp;</p>



<p>For the millions of people living with depression, this work represents a path toward precision care, shortening the time to effective treatment and improving quality of life.</p>



<p>The future of depression treatment lies not just in developing new medications, but in better understanding who needs what treatment when. This predictive model brings us measurably closer to that goal, promising a world where effective depression treatment is not a matter of luck, but of precision.</p>



<p><em>If you or someone you know is struggling with depression, please reach out to a mental health professional. The </em><a href="https://988lifeline.org/" target="_blank" rel="noreferrer noopener"><em>National Suicide Prevention Lifeline</em></a><em> (988) provides 24/7 support for those in crisis.</em><br></p>


Predicting Treatment-Resistant Depression Using the 23andMe Survey Data


<p>Every year on the third Saturday in October, the world celebrates International Archaeology Day, recognizing the important contributions archaeological research makes to society. This year, to celebrate, we&#8217;re spotlighting one of our favorite archaeological mysteries in the <a href="https://blog.23andme.com/articles/23andmes-historic-matches" target="_blank" rel="noreferrer noopener">Historical Matches</a><sup>SM </sup>feature—the skeletons of Roopkund Lake.</p>



<h2 class="wp-block-heading" id="h-about-roopkund-lake"><strong>About Roopkund Lake</strong></h2>



<p>Roopkund Lake is a small glacial lake located over 5,000 meters (over 16,000 ft) above sea level in the Nanda Devi National Park, in the Indian Himalayas. In 1942, a forest ranger patrolling the park stumbled upon a chilling scene: hundreds of skeletal remains strewn around the lake. The site has captivated researchers and locals alike ever since.</p>



<p>The mystery of who these individuals were, how they died, and why they were in such a remote and inhospitable location has sparked decades of speculation. Some early researchers proposed that the remains belonged to an army that had lost its way in the mountains, while others suggested they might have been traders following a trans-Himalayan route that had since vanished. A few archaeologists posited that they were pilgrims traveling to nearby shrines, possibly part of the ancient <em>Nanda Devi Raj Jat</em>, a religious procession spanning ~290 kilometers (~180 miles) that is still undertaken in the region every 12 years.</p>



<p>The identification of women and children among the dead, however, made some of the proposed explanations less plausible–especially the claim that they may have been members of an army. Without weapons, trade goods, or written records, no single theory could fully account for the diversity and composition of the group. Local folklore offered its own interpretation: a king, his family, and attendants on a pilgrimage to honor the mountain goddess Nanda Devi had violated sacred protocol and were struck down by a deadly hailstorm in divine retribution.</p>



<h2 class="wp-block-heading" id="h-an-exciting-23andme-connection"><strong>An exciting 23andMe connection</strong></h2>



<p><a href="https://pubmed.ncbi.nlm.nih.gov/31431628/" target="_blank" rel="noreferrer noopener">In 2019</a>, scientists sequenced the genomes of 38 individuals from Roopkund Lake in an effort to better understand the origins of the mysterious remains. But instead of resolving this longstanding mystery, their findings uncovered an even more complex puzzle. </p>



<p>So what makes this story one of 23andMe’s favorite archaeological mysteries? That 2019 research study was actually led by our very own Dr. Éadaoin Harney—a Scientist on the Population Genetics R&amp;D Team and 23andMe’s “resident ancient DNA expert.” She worked on this study during her PhD at Harvard University where she was a member of Prof. David Reich’s ancient DNA laboratories–one of the largest ancient DNA research laboratories in the world.</p>



<p>“<strong>When I first started working with the Roopkund ancient DNA data, I thought that genetics would be a simple and straightforward way to finally help solve the mystery of who they were</strong>,” said Dr. Harney. But she was in for a big surprise! “The first hint that this wasn’t going to be as simple as I initially thought was when we discovered how ancestrally diverse the Roopkund individuals were. Then we learned that they didn’t all die at the same time, as had previously been believed. Instead radiocarbon dates generated from the bones spanned over 1,000 years.”</p>



<h2 class="wp-block-heading" id="h-how-dna-adds-to-the-mystery"><strong>How DNA adds to the mystery</strong></h2>



<p>The 2019 genetic analysis showed that the individuals fell into three distinct genetic groups, with ancestries from across the globe.</p>



<p>The largest group (which we’ll refer to as Roopkund A) consisted of 23 individuals who died between the 7th and 10th centuries CE, likely during multiple distinct events. Genetically, all appeared South Asian, but with remarkably diverse ancestries–each individual appeared most closely related to different present-day South Asian populations. This finding suggests that they may have traveled to the lake from multiple locations across the subcontinent. Although the exact purpose of their journey to Roopkund Lake remains uncertain, some researchers speculate that they may have been early participants in the <em>Nanda Devi Raj Jat</em>, a traditional pilgrimage that still passes by the lake every 12 years.</p>



<p>The other two groups were even more surprising. One group (Roopkund B) consisted of 14 individuals whose DNA connected them to present-day populations from the eastern Mediterranean—particularly populations in Greece and neighboring regions. The third group (Roopkund C) was represented by a single individual with genetic ancestry most similar to Southeast Asian populations. Radiocarbon dating revealed that these individuals likely died in a single event some time between the 17th and 20th centuries. Why people with ancestry from such distant regions were traveling together in one of the most remote parts of the Himalayas remains a mystery to this day.</p>



<p>Dr. Harney joined 23andMe in 2020 with the goal of creating an approach to identify direct genetic connections between historical and living people. She and her colleagues on the Population Genetics R&amp;D Team succeeded! This technology was first described in their <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC10958645/" target="_blank" rel="noreferrer noopener">2023 study of African Americans from Catoctin Furnace</a>, which was published in (and featured on the cover of) Science. She then helped spearhead the creation of the 23andMe Historical Matches feature, enabling customers to learn how they connect to different historical and ancient individuals.</p>



<p>Over the last five years, one of her secret ambitions was to use this technology to try and finally solve the mystery of the Roopkund individuals&#8217; identities. Could identifying any close genetic relatives of the Roopkund individuals in the 23andMe genetic database help us learn about their identities and answer what brought them to Roopkund?</p>



<h2 class="wp-block-heading" id="h-did-we-solve-the-mystery"><strong>Did we solve the mystery?</strong></h2>



<p>We compared the Roopkund individuals to over 11 million research consenting participants in the 23andMe genetic database. While we were hoping this analysis would reveal a number of close genetic relatives, unfortunately, the mystery of Roopkund Lake lives on.</p>



<p>We found that only about 1,240 research participants—less than 0.011% of the individuals included in our analysis—share any sort of genetic connection to the Roopkund individuals. And of those participants, we can count the number of individuals who share over 30 cM of DNA (what we label a “significant genetic connection” in the Historical Matches feature) on just one hand. In fact, we found so few &#8220;significant relatives” that the chances any of those connections trace back to a recent shared common ancestor on a genealogical family tree are extremely slim.</p>



<p><em>(Although if you happen to be one of those lucky individuals who sees a “significant connection” listed to one of the Roopkund individuals in your 23andMe report, please </em><a href="https://customercare.23andme.com/hc/en-us/requests/new" target="_blank" rel="noreferrer noopener"><em>reach out to us</em></a><em>, as we’d love to learn more!)</em></p>



<h2 class="wp-block-heading" id="h-what-else-did-we-discover"><strong>What else did we discover?</strong></h2>



<p>So, we didn’t solve the mystery of who the Roopkund individuals were, but we did gather fascinating data about their connections to the present day.</p>



<p>First, here is a breakdown of the 17 Roopkund individuals whose DNA was well preserved enough to include in our analyses:</p>



<ul class="wp-block-list">
<li>8 from Roopkund A (South Asian ancestry)</li>



<li>8 from Roopkund B (Eastern Mediterranean ancestry)</li>



<li>1 from Roopkund C (Southeast Asian ancestry)</li>
</ul>



<p>As we mentioned, about 1,240 23andMe research participants shared a genetic connection to the Roopkund individuals. The figure below shows the number of matches each Roopkund group received and highlights the amount of DNA shared. As you can see, the vast majority of the connections we discovered involve less than 20 cM of DNA, meaning that they likely trace back to a shared common ancestor who lived long before any of the Roopkund individuals.</p>



<figure class="wp-block-image size-full is-resized"><img loading="lazy" decoding="async" width="411" height="252" src="http://35.88.189.111/wp-content/uploads/2025/10/image-3.png" alt="" class="wp-image-34359" style="width:625px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-3.png 411w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-3-300x184.png 300w" sizes="auto, (max-width: 411px) 100vw, 411px" /><figcaption class="wp-element-caption"><em>This figure shows the distribution of total shared DNA that we detected between 23andMe research participants and each of the Roopkund groups (A, B and C). It shows that the vast majority of the connections we identified are to individuals in the Roopkund B group, and the DNA segments they share are shorter than 15 cM. In order to protect participant privacy, all counts <em> less than or equal to </em>5 are masked and appear equal to 5. </em></figcaption></figure>



<p>Of those who share a genetic connection, the majority (~1,160) shared a connection to one or more individuals in the Roopkund B group—the one with Eastern Mediterranean-related ancestry. This didn&#8217;t surprise us, since the majority of 23andMe research participants have European ancestry, making them more likely to be related to the Roopkund B individuals.</p>



<p>In addition to occurring more frequently, the Roopkund B individuals also shared some of the strongest genetic connections to 23andMe research participants, as shown in the figure below which depicts the maximum amount of DNA that each Roopkund individual shared with a research participant.</p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="643" height="448" src="http://35.88.189.111/wp-content/uploads/2025/10/image-4.png" alt="" class="wp-image-34360" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-4.png 643w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/image-4-300x209.png 300w" sizes="auto, (max-width: 643px) 100vw, 643px" /><figcaption class="wp-element-caption"><em>This figure shows the maximum amount of shared DNA that we detected between 23andMe research participants and each of the Roopkund individuals. The individuals are arranged along the x-axis by when they lived, as measured by radiocarbon dating. We masked this result for Roopkund individuals who shared DNA with 5 or fewer 23andMe research participants in order to protect participant privacy, and reported maximum DNA sharing as equal to 0.</em></figcaption></figure>



<p>We decided to see what Genetic Groups the Roopkund individuals could be connected to, using the same approach that we use to connect customers to these Genetic Groups.&nbsp;&nbsp;&nbsp;</p>



<p>Many of the Roopkund B individuals received matches to Genetic Groups in south eastern Europe, with the strongest connections to groups in Greece and Crete–exactly mirroring the findings of the original study!</p>



<figure class="wp-block-image size-large is-resized"><img loading="lazy" decoding="async" width="1024" height="849" src="http://35.88.189.111/wp-content/uploads/2025/10/roopkund_b_2-1024x849.png" alt="" class="wp-image-34352" style="width:575px" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/roopkund_b_2-1024x849.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/roopkund_b_2-300x249.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/roopkund_b_2-768x636.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/roopkund_b_2-880x729.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/roopkund_b_2-1180x978.png 1180w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /><figcaption class="wp-element-caption"><em>This map shows the location of the different Genetic Groups that we compared the Roopkund B individuals to. Groups shown in darker colors shared the strongest genetic matches to one or more of the Roopkund B individuals.</em></figcaption></figure>



<p>Since the Roopkund A and Roopkund C individuals shared far fewer genetic connections to 23andMe research participants, it was hard to localize their ancestry in the same way. But we were able to connect the Roopkund C individual to a single Genetic Group, located in China. This finding is generally consistent with the original study, where this individual exhibited connections to populations in East and Southeast Asia.&nbsp;</p>



<figure class="wp-block-image size-large is-resized"><img loading="lazy" decoding="async" width="1024" height="874" src="http://35.88.189.111/wp-content/uploads/2025/10/roopkund_c_2-1024x874.png" alt="" class="wp-image-34353" style="width:592px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/roopkund_c_2-1024x874.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/roopkund_c_2-300x256.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/roopkund_c_2-768x655.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/roopkund_c_2-880x751.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/roopkund_c_2-1180x1007.png 1180w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /><figcaption class="wp-element-caption"><em>This map shows the location of the different Genetic Groups that we compared the Roopkund C individual to. Groups shown in darker colors shared the strongest genetic matches to the Roopkund C individual.</em></figcaption></figure>



<p>We couldn’t connect the Roopkund A individuals to any of the Genetic Groups that we have identified. That doesn’t mean they aren’t genetically related to any of these groups. Instead it is likely just because the original research team was only able to sequence a small amount of DNA from these individuals, making it harder to connect them to research participants in the 23andMe database.&nbsp;</p>



<h2 class="wp-block-heading" id="h-what-s-next"><strong>What’s Next?</strong></h2>



<p>So for now, all we can say is that the mystery of Roopkund Lake continues. But we promise this archaeological site is one that is close to our hearts. If we have any updates in the future, we’ll be sure to let you know.</p>



<h2 class="wp-block-heading" id="h-learn-more"><strong>Learn more</strong></h2>



<p>Want to see if you share a genetic connection with any of the individuals who died at Roopkund Lake—or hundreds of other historical people? The Historical Matches feature is available to <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a>™ members.</p>



<p>And if you are interested in finding ways to celebrate International Archaeology Day, check out organizations like the Archaeological Institute of America, which has an exciting <a href="https://www.archaeological.org/events/category/international-archaeology-day/list/" target="_blank" rel="noreferrer noopener">calendar of Archaeology-related events</a>.</p>



<p></p>


New Historical Matches Could Connect You to the Mysterious Skeletons of Roopkund Lake


<p><em>This update is currently available to all eligible customers on the latest, V5, genotyping chip. </em></p>



<p>The 23andMe Ancestry Team has been working hard on <a href="https://blog.23andme.com/articles/a-major-update-to-ancestry-composition-is-coming-soon" target="_blank" rel="noreferrer noopener">a major update to the Ancestry Composition report</a>, and results are now available! Our goal is to provide the most accurate and meaningful genetic ancestry results in the industry. We ground our models in rigorous science, guided by established population genetics research, to ensure your results are consistent, reliable, and can help guide your personal journey of discovery.</p>



<h2 class="wp-block-heading" id="h-what-changes-you-ll-see">What changes you&#8217;ll see</h2>



<ul class="wp-block-list">
<li><strong>New granularity in your ancestry percentages: </strong>33 new populations in Europe and 6 in the Americas to explore. Plus we&#8217;ve updated our algorithm to eliminate “Broadly” and “Unassigned” categories in the default results view.&nbsp;</li>



<li><strong>More accurate results: </strong>A new state-of-the-art DNA phasing pipeline reduces errors and gives a more accurate estimate of your percentages, even if your ancestry isn&#8217;t from Europe or the Americas.&nbsp;</li>



<li><strong>New features:</strong> A new “Version History” section lets you compare your new results to your previous result, and <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a>™ members can also access all previous versions of their results at different confidence thresholds.</li>
</ul>



<p>This update powers your Ancestry Composition, Ancestry Timeline, Parental Inheritance, DNA Painting, and more.</p>



<h2 class="wp-block-heading" id="h-our-focus-for-this-update">Our focus for this update</h2>



<p>For this update we focused on improving the entire Ancestry Composition pipeline integrating the latest research. Throughout the rounds of development we look at two major metrics: precision and recall. Precision lets us know<strong> how often</strong> we correctly predict that a piece of DNA is from a specific population. Recall tells us <strong>how much</strong> DNA from a specific population we can correctly identify. Working to maximize both precision and recall is critical to making Ancestry Composition and other ancestry features as accurate as possible.</p>



<figure class="wp-block-image alignleft size-full is-resized"><img loading="lazy" decoding="async" width="366" height="368" src="http://35.88.189.111/wp-content/uploads/2025/09/AC78_wheel.png" alt="" class="wp-image-34276" style="width:170px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/AC78_wheel.png 366w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/AC78_wheel-298x300.png 298w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/AC78_wheel-150x150.png 150w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/AC78_wheel-271x271.png 271w" sizes="auto, (max-width: 366px) 100vw, 366px" /></figure>



<p>The final models in this update had good precision and recall across the new populations, ensuring the accuracy of the ancestry breakdown predictions while also expanding the specificity and granularity of the populations. One example of the improvements gained by this update is the reduced amount of North Asian ancestry predicted for some Indigenous North American customers. You can learn more about the development process and see precision and recall metrics for each population in the <a href="https://www.23andme.com/ancestry-composition-guide/" target="_blank" rel="noreferrer noopener">Ancestry Composition Guide</a>.</p>



<p>While this update focused on increasing granularity in Europe and the Americas, customers from other parts of the world will still benefit thanks to the improvements to the science and the removal of broadly and unassigned ancestry.</p>



<p><a href="https://you.23andme.com/" target="_blank" rel="noreferrer noopener"><strong>Sign in</strong></a><strong> and check out your new results.&nbsp;</strong></p>



<p>Not yet a 23andMe member? Learn more about what <a href="https://www.23andme.com/compare-dna-tests/" target="_blank" rel="noreferrer noopener">23andMe has to offer</a>.</p>



<h2 class="wp-block-heading" id="h-some-questions-you-might-be-wondering-about">Some questions you might be wondering about</h2>



<p><strong>Why are certain populations combined?</strong></p>



<p>To define the 78 Ancestry Composition populations, we analyzed the reference datasets, chose candidate populations that appeared to cluster together, and then evaluated whether we can distinguish those groups in practice. Some populations tend to cluster on their own, but most country-level populations overlap to some degree. In these cases, we experiment with different groupings of country-level populations to find combinations that we can distinguish with high confidence. Check out the <a href="https://www.23andme.com/ancestry-composition-guide/" target="_blank" rel="noreferrer noopener">Ancestry Composition Guide</a> to learn more.</p>



<p>Does this mean that the people in those groups are the same? No. Each group has its own history, culture, and often different languages. These groupings are a reflection of our current genetic understanding and scientific methods, not a statement about cultural identity.</p>



<p>Does this mean DNA that is assigned to these populations is from all groups? Not necessarily. For example, DNA assigned to the Belarusian, Polish &amp; Ukrainian group might mean your ancestors were from one, two, or all three of those country-level populations. Sometimes other information from your DNA, such as your Genetic Groups, might help you identify more specific locations your ancestors may have come from.&nbsp;</p>



<p><strong>Why are some reference panels smaller than before?</strong></p>



<p>A reference panel, or a reference population or reference dataset, is a collection of DNA samples from people with some common connection. We compare your DNA to these reference panels to determine which ancestry most closely corresponds to your DNA. We often use 23andMe research participants who tell us they have four grandparents all born in the same country for reference panels.</p>



<p>However, sometimes when we look at the ancestry prediction for individuals in a reference panel for a specific population a few individuals don&#8217;t end up being predicted to have a reasonably large percentage of their DNA from that population. These individuals are considered outliers. As part of this update we systematically reviewed our reference panels around the world to remove these outliers. But don&#8217;t worry; even though some reference panels might be smaller, we still check that the models perform as well as (or better than) before for people with ancestry from these regions.&nbsp;</p>



<p><strong>Why is there no Indigenous Caribbean population?</strong></p>



<p>To define a new ancestry population we need reference panels made up of individuals who have deep genetic roots from one place. However, many individuals from the Caribbean are highly admixed (“admixture” refers to places where there was mixing of previously separate populations). This makes it incredibly difficult to identify a sufficient number of individuals with primarily indigenous DNA from the Caribbean. The reference panels for the new Indigenous American populations are almost entirely unadmixed, which is why we are able to provide ancestry percentages for these populations.&nbsp;</p>



<figure class="wp-block-image alignright size-large is-resized"><img loading="lazy" decoding="async" width="1024" height="502" src="http://35.88.189.111/wp-content/uploads/2019/08/avg_ancestry_caribbean-1024x502.png" alt="" class="wp-image-27359" style="width:371px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2019/08/avg_ancestry_caribbean-1024x502.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2019/08/avg_ancestry_caribbean-300x147.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2019/08/avg_ancestry_caribbean-768x376.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2019/08/avg_ancestry_caribbean-880x431.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2019/08/avg_ancestry_caribbean-1180x578.png 1180w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p>So where does Indigenous Caribbean ancestry show up? We tend to see that Indigenous American ancestry in individuals from the Caribbean is spread among several of the new Indigenous American populations (especially North American, Southern Mesoamerican, Central Andean &amp; Amazonian, and Northern Andean).</p>



<p>Does this mean Indigenous Caribbean ancestors came from those places? Not necessarily. It simply means that of the options available today, those populations are the closest genetic match.&nbsp;</p>



<p><strong>Why weren&#8217;t other parts of the world updated?</strong></p>



<p>While we would love to be able to make major updates around the world more frequently, each new population requires new reference data and major updates in the prediction models. Throughout the years we have increased the number of populations across the rest of the world; however, we have not updated the populations in Europe since 2012. This update was an important opportunity to provide more detail in Europe and the Americas.</p>



<p>We will continue to work towards providing more specificity and granularity around the world in your ancestry percentages as well as Genetic Groups (keep an eye out over the next few months for new Genetic Groups in Africa), <a href="https://blog.23andme.com/articles/23andmes-historic-matches" target="_blank" rel="noreferrer noopener">Historical Matches</a><sup>SM</sup>, and other features.</p>



<p><strong>Why did the colors change?</strong></p>



<p>Adding 39 new colors to the color palette was quite the task for the 23andMe Design Team. The team took this opportunity to think about the colors holistically, coming up with a new system that provides a gradient across the world, allowing for nearby populations that are closer together geographically to be represented by more similar colors, while at the same time providing a system that can work for more populations in the future.</p>



<p><strong>Who will get this update?</strong></p>



<p>All customers genotyped on the current (V5) chip and with access to the ancestry service will see this update. A genotyping chip (or array) tests for a fixed set of genetic variants (SNPs) across the genome. Different chip versions (V1, V2, V3, V4, V5, etc.) test for different sets of SNPs. More recent chips often include better coverage for certain populations, recently discovered variants, or better genetic markers that help improve ancestry?composition algorithms or detect health?associated variants.</p>



<p>Ancestry Composition is trained on specific genotyping chip versions, and these latest models were only trained on the latest chip version. The models are incompatible with data from older genotyping chips, as older chips don’t include most of the genetic markers used by these new ancestry models. More recent chip versions are also designed with better coverage for diverse populations.<br>If you&#8217;re on an older chip version (or not sure which chip version you have) learn about chip upgrades <a href="https://customercare.23andme.com/hc/en-us/articles/360025014494-How-Do-I-Upgrade-My-Genotyping-Chip" target="_blank" rel="noreferrer noopener">here</a>.</p>



<p><strong>What happens if my family deleted data and I want to connect with them?</strong></p>



<p>When you connect with a biological parent through Your Connections, we use the additional information we learn from your parents&#8217; DNA to improve the resolution of your Ancestry Composition results. You will also be able to see the proportions of each ancestry that you inherited from each parent in the Parental Inheritance section in your Ancestry Composition report. If a family member has deleted their account they will need to purchase a new kit and create a new account before you can connect with them.</p>


It’s Finally Here: A New Version of Ancestry Composition


<p>Each year from September 15–October 15, National Hispanic Heritage Month celebrates the histories, cultures, and contributions of people from Spain, Latin America, and other Spanish-speaking communities. To mark the occasion, we’re highlighting a remarkable ancient DNA study from Las Gobas, a medieval site in northern Spain that sheds new light on life in early Iberia, which comprises present-day Spain and Portugal.</p>



<h2 class="wp-block-heading" id="h-setting-the-scene-iberia-in-the-early-medieval-period">Setting the Scene: Iberia in the Early Medieval Period</h2>



<p>From the 5th to 8th centuries CE, Iberia was ruled by the Visigoths, a Germanic people who established power after the fall of the Western Roman Empire. In 711 CE, their kingdom collapsed after the Umayyads—an Islamic dynasty with roots in Arabia and North Africa—invaded and established the Emirate (and later the Caliphate) of Córdoba. This new state controlled much of Iberia, along with the Balearic Islands and parts of North Africa.</p>



<p>In the mountainous north, however, many communities retained their independence and Christian traditions, even as the rest of the Iberian peninsula underwent profound cultural and political change.</p>



<h2 class="wp-block-heading" id="h-life-at-las-gobas">Life at Las Gobas</h2>



<p>Las Gobas, located in today’s province of Burgos in northern Spain, consists of 13 rock-cut caves and several freestanding structures. Beginning in the 7th century, it served as a mixed-use settlement with homes, a Christian church, and a cemetery. By the late 9th century, the residential area was abandoned, but the site continued to be used as a burial ground and place of worship until the 11th century.</p>



<p><a href="https://pubmed.ncbi.nlm.nih.gov/39196943/" target="_blank" rel="noreferrer noopener">In 2024</a>, researchers analyzed DNA from 33 individuals buried at Las Gobas. They discovered that the community’s ancestry remained surprisingly stable over the centuries, with little evidence of genetic influence from the Islamic expansion that reshaped much of Iberia.</p>



<p>Why was Las Gobas different? Their DNA offered a clue. Many individuals carried stretches of identical DNA inherited from both parents—patterns that often occur in small, insular populations with limited outside contact. This genetic isolation likely helped shield the community from broader population shifts happening elsewhere.</p>



<p>The study also revealed striking details about life at Las Gobas:</p>



<ul class="wp-block-list">
<li><strong>Inbreeding: </strong>The DNA of several individuals showed evidence that their parents were close relatives; likely first cousins or closer.</li>



<li><strong>Disease:</strong> DNA evidence showed infections from multiple pathogens, including what may be one of the earliest documented cases of smallpox in northern Iberia.</li>



<li><strong>Violence:</strong> Skeletal remains showed signs of traumatic injuries, likely from swords—evidence of interpersonal conflict or warfare.</li>
</ul>



<p>Taken together, the findings paint a vivid—and sometimes harsh—picture of life more than a thousand years ago in a small, tightly knit community in northern Spain.</p>



<h2 class="wp-block-heading" id="h-learn-more">Learn more</h2>



<p>Want to see if you share a genetic connection with these newly added individuals from Las Gobas—or hundreds of other historical people? The <a href="https://blog.23andme.com/articles/23andmes-historic-matches" target="_blank" rel="noreferrer noopener">Historical Matches</a><sup>SM</sup> feature is available to <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a>™ members.</p>



<p></p>


New Historical Matches Could Connect You to the Medieval Iberian Site of Las Gobas


<p><a href="https://blog.23andme.com/articles/ancestry-composition-version-7-is-here" target="_blank" rel="noreferrer noopener"><em>This update</em></a><em> <em>is currently available to all eligible customers on the latest, V5, genotyping chip.</em></em></p>



<p>23andMe’s flagship Ancestry Composition algorithm was last updated in 2022, when three new reference populations were added in China. Since then, the 23andMe Ancestry Team has focused on improving the specificity of reference populations and updating the methods underlying this state-of-the art algorithm. The result? More specificity and accuracy in the ancestry breakdowns we provide.&nbsp;</p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="1024" height="508" src="http://35.88.189.111/wp-content/uploads/2025/09/Ac-omega-map-correc-1024x508.png" alt="" class="wp-image-34246" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/Ac-omega-map-correc-1024x508.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/Ac-omega-map-correc-300x149.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/Ac-omega-map-correc-768x381.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/Ac-omega-map-correc-880x437.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/Ac-omega-map-correc-1180x585.png 1180w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p>The project, Version 7 of Ancestry Composition, is the most significant update to the feature ever.</p>



<h2 class="wp-block-heading" id="h-improved-algorithm-expanded-populations-better-results">Improved algorithm, expanded populations, better results</h2>



<p>Over the last few months, we’ve been hard at work finalizing the details on this major update to your favorite report: Ancestry Composition.&nbsp;</p>



<figure class="wp-block-image size-large is-resized"><img loading="lazy" decoding="async" width="1024" height="499" src="http://35.88.189.111/wp-content/uploads/2025/09/image-3-1024x499.png" alt="" class="wp-image-34237" style="width:537px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/image-3-1024x499.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/image-3-300x146.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/image-3-768x374.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/image-3-880x429.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/image-3-1180x575.png 1180w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/image-3.png 1600w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p>Here’s what we&#8217;ve been working on:</p>



<ul class="wp-block-list">
<li><strong>Better breakdowns in Europe and the Americas</strong>: Thanks mainly to consented 23andMe research participants we&#8217;ve been able to expand the number of unique populations in our reference datasets. Reference datasets are collections of DNA samples from people with deep roots in a specific part of the world. It&#8217;s what is needed to compare each piece of your DNA to in order to determine where in the world that DNA most likely came from. What this means is we’re launching with nearly four times the resolution in Europe and six new populations in the Americas. We also took the opportunity to refine reference datasets from around the world, making them more specific to each global population.</li>



<li><strong>Enhanced Accuracy:</strong> The accuracy of these new ancestry results are greatly improved by using our <a href="https://www.cell.com/hgg-advances/fulltext/S2666-2477(25)00082-X" target="_blank" rel="noreferrer noopener">recently published</a>, state-of-the-art DNA phasing method. You could think of phasing as sorting which DNA you inherited from each parent. Reducing errors in phasing means a more accurate estimate of your ancestry percentages and better <a href="https://customercare.23andme.com/hc/en-us/articles/212860507-Chromosome-Painting-23andMe-Ancestry-Results" target="_blank" rel="noreferrer noopener">DNA Painting</a>.&nbsp;</li>



<li><strong>Elimination of Broadly and Unassigned DNA: </strong>We are updating our algorithm to report the most likely assignment for a given stretch of DNA rather than at a fixed confidence threshold. This will have the benefit of eliminating &#8220;Broadly&#8221; and &#8220;Unassigned&#8221; categories in the default results view. You will still be able to view your results at different confidence thresholds in the Version History section.</li>



<li><strong>Better Error Detection:</strong> We&#8217;ve upgraded our smoother to better filter out erroneous trace ancestries between two larger blocks of ancestry. See our <a href="https://www.23andme.com/ancestry-composition-guide/" target="_blank" rel="noreferrer noopener">Ancestry Composition Guide</a> for more information about the current smoother.</li>



<li><strong>Version History:</strong> Compare your new results to your old ones in a new &#8220;Version History&#8221; section. <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a>™ members will also be able to access previous versions at different confidence settings.</li>
</ul>



<h2 class="wp-block-heading" id="h-what-are-the-new-reference-populations-nbsp">What are the new reference populations?&nbsp;</h2>



<ul class="wp-block-list">
<li><strong>33 new ancestry populations in Europe are coming:</strong> Albanian &amp; Macedonian; Andalusian, Asturian &amp; Castilian; Aragonese &amp; Catalan; Austrian &amp; Southern German; Basque; Belarusian, Polish &amp; Ukrainian; Belgian, Rhinelander &amp; Southern Dutch; Bosnian, Croatian, Montenegrin &amp; Serbian; Bulgarian, Moldovan &amp; Romanian; Canary Islander; Czech, Hungarian, Slovak &amp; Southern Polish; Danish; Dutch &amp; Northern German; English; Estonian; Finnish; French; Greek; Icelandic; Irish; Kosovar &amp; Northern Albanian; Latvian; Lithuanian; Maltese; Northern Italian; Norwegian; Portuguese &amp; Galician; Russian; Sardinian; Scottish; Slovenian; Southern Italian; Swedish; Swiss, Southwestern German &amp; Western Austrian; Welsh</li>
</ul>



<figure class="wp-block-image size-large is-resized"><img loading="lazy" decoding="async" width="1024" height="840" src="http://35.88.189.111/wp-content/uploads/2025/09/europe_map-1024x840.png" alt="" class="wp-image-34262" style="width:523px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/europe_map-1024x840.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/europe_map-300x246.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/europe_map-768x630.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/europe_map-880x722.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/europe_map.png 1101w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<ul class="wp-block-list">
<li><strong>Indigenous American will be broken into 6 new ancestry populations:</strong> Arctic North American, Central Andean &amp; Amazonian, North American, Northern Andean, Southern Mesoamerican, and Western North American</li>
</ul>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="562" height="393" src="http://35.88.189.111/wp-content/uploads/2025/09/image-2.png" alt="" class="wp-image-34236" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/image-2.png 562w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/image-2-300x210.png 300w" sizes="auto, (max-width: 562px) 100vw, 562px" /></figure>



<h2 class="wp-block-heading" id="h-your-dna-story-now-clearer-across-time-place-and-family">Your DNA story, now clearer across time, place, and family</h2>



<p>These updates, drawn from sharper science and richer data, power everything you use to explore your ancestry, including Ancestry Timeline, Parental Inheritance, DNA Painting, and more. This builds on the world’s most comprehensive ancestry breakdown on the market with over 4,000 regions, helping you experience the life-changing power of DNA by tracing where your ancestors lived and what they passed on to you.</p>



<p>Ancestry Composition, Version 7. More precision. More connection. More you.</p>



<p>This is a massive project for us and a chance to get back to our roots by digging deeper into yours. We’re thrilled you’re as excited as we are.</p>



<p>The 23andMe Ancestry Team</p>



<p></p>


A Major Update to Ancestry Composition


<h5 class="wp-block-heading" id="h-data-initiative-accelerates-access-to-vital-genetic-and-clinical-insights">Data initiative accelerates access to vital genetic and clinical insights</h5>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="1200" height="675" src="http://35.88.189.111/wp-content/uploads/2025/09/lung-double-edited-2.png" alt="Illustration of lungs on a background with a larger illustration of lungs" class="wp-image-34192" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/lung-double-edited-2.png 1200w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/lung-double-edited-2-300x169.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/lung-double-edited-2-1024x576.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/lung-double-edited-2-768x432.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/lung-double-edited-2-880x495.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/lung-double-edited-2-1180x664.png 1180w" sizes="auto, (max-width: 1200px) 100vw, 1200px" /></figure>



<p>At the 2025 World Conference on Lung Cancer in Barcelona, the 23andMe Research Institute, in collaboration with Troper Wojcicki Philanthropies and the health data software company Lifebit, introduced an open-source platform that could help fast-track research discoveries through a powerful new cancer data repository.</p>



<p>The announcement comes just a year after the start of the<a href="https://www.23andme.com/lung-cancer" target="_blank" rel="noreferrer noopener"> Lung Cancer Genetics Study</a>, spearheaded by 23andMe and bringing together more than 20 lung cancer advocacy and science organizations to recruit 10,000 people diagnosed with lung cancer. Their goal is to develop new ways to identify those at highest risk for lung cancer early, while also finding possible new treatments for this deadly cancer.</p>



<h2 class="wp-block-heading">The Personal Drive Behind the Mission</h2>



<p>The effort is personal for many of the advocates who are part of the collaboration and also for Anne Wojcicki, founder and CEO of the 23andMe Research Institute. Anne&#8217;s sister Susan Wojcicki died of lung cancer last year, just as the study began.</p>



<p>&#8220;My sister was passionate about understanding the science behind lung cancer so future generations could prevent the disease and treat it. The Lung Cancer Genetics Study is a step towards achieving that.” Anne said.</p>



<p>In the months before her death, <a href="https://blog.23andme.com/articles/a-legacy-of-hope-in-the-fight-against-lung-cancer" target="_blank" rel="noreferrer noopener">Susan had been very involved in helping to create the study with the hope that it could help others</a>. The idea was not just to leverage genetic data for insights into lung cancer but also to create a repository of data that would be available to as many qualified researchers as possible.&nbsp;</p>



<p>The platform — created through the collaboration between the 23andMe Research Institute, Troper Wojcicki Philanthropies, and Lifebit — offers a secure, open-source data platform for researchers to access this novel dataset. Powered by Lifebit&#8217;s Health Data Ecosystem, the platform provides qualified researchers with no-cost access to de-identified data from people diagnosed with lung cancer who have consented to participate in this research.&nbsp;</p>



<p>&#8220;More people die of lung cancer each year than breast, colon, and prostate cancer combined, yet it is one of the least funded for research. It’s important for this powerful new tool to be available at no cost to qualified researchers so that the best minds can work on unlocking the genetic insights that may lead to a cure,&#8221; said Anne.</p>



<h2 class="wp-block-heading">Building a One-of-a-Kind Data Resource</h2>



<p>Since launching the <a href="https://blog.23andme.com/articles/23andme-launches-new-genetic-study-of-lung-cancer" target="_blank" rel="noreferrer noopener">Lung Cancer Genetics Study</a>, more than 1,200 people diagnosed with lung cancer have enrolled to participate in the research. The goal is to enroll 10,000 people by 2027, but the study has already assembled one of the most diverse cohorts ever for lung cancer genetic research.&nbsp;</p>



<figure class="wp-block-image alignright size-large is-resized"><img loading="lazy" decoding="async" width="1024" height="464" src="http://35.88.189.111/wp-content/uploads/2025/09/teal_waldos-1024x464.jpg" alt="" class="wp-image-34183" style="width:242px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/teal_waldos-1024x464.jpg 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/teal_waldos-300x136.jpg 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/teal_waldos-768x348.jpg 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/teal_waldos-880x399.jpg 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/teal_waldos-1180x534.jpg 1180w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p>Genetics is just one of many factors involved in why some people develop lung cancer. Exposure to tobacco smoke is perhaps the best-known risk factor; however, <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2409903/" target="_blank" rel="noreferrer noopener">80 to 90%</a> of people with a history of tobacco exposure <em>never</em> get lung cancer, and many people <em>without</em> tobacco exposure get the disease. These facts<br>underscore the importance of investigating other, less well-known risk factors, like air pollution, radon exposure, and workplace-related exposures.</p>



<p>And there&#8217;s much more we don&#8217;t know about lung cancer. Many do not realize, for instance, that lung cancer is the <a href="https://www.cancer.org/content/dam/cancer-org/research/cancer-facts-and-statistics/annual-cancer-facts-and-figures/2025/2025-cancer-facts-and-figures-acs.pdf" target="_blank" rel="noreferrer noopener">number one cause of cancer death in women</a> and <a href="https://www.massgeneralbrigham.org/en/about/newsroom/articles/most-common-cancers-in-women#:~:text=It%20may%20not%20surprise%20you,in%20women%20and%20people%20AFAB." target="_blank" rel="noreferrer noopener">the second most common cancer in women</a>. Although lung cancer overall is decreasing because of declines in tobacco use, lung cancer among people who have never smoked <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7431055/#:~:text=As%20expected%2C%20the%20primary%20factor%20leading%20to,non%2Dsmokers%20has%20been%20noted%20to%20be%20increasing." target="_blank" rel="noreferrer noopener">is stable or increasing</a>, and <a href="https://www.webmd.com/lung-cancer/features/lung-cancer-women-who-never-smoked" target="_blank" rel="noreferrer noopener">two-thirds of people diagnosed with lung cancer with no smoking history are women</a>.&nbsp;</p>



<p>Understanding the genetics of lung cancer may help unravel some of the factors underlying those statistics. Additionally, learning more about the underlying genetics could provide researchers with more insight into the biological mechanisms of the disease, aiding in the development of improved therapies and new diagnostics.&nbsp;</p>



<p>The de-identified data that participants in the Lung Cancer Genetic Study consented to share isn’t limited to just genetics. Many participants also chose to provide self-reported clinical, lifestyle, and even tumor biomarker data. The study will also follow participants over time, gathering important longitudinal data to help researchers understand the progression of cancer as well as the response to treatments.&nbsp;</p>



<h2 class="wp-block-heading">Empowering Researchers</h2>



<p>By opening up access to qualified researchers, the collaborators aim to address significant gaps in current lung cancer research, break down institutional silos, and remove barriers to dataset access, thereby accelerating research progress.&nbsp;</p>



<p>&#8220;We&#8217;re delivering more than a data system — we&#8217;re enabling an entirely new model for research equity and access,&#8221; said Nadia Litterman, PhD, Director of Scientific Affairs and Partnerships at Troper Wojcicki Philanthropies.</p>



<h2 class="wp-block-heading">Find Out More</h2>



<p>Anyone who has been diagnosed with lung cancer can learn more and enroll in the study at<a href="http://23andme.com/lung-cancer" target="_blank" rel="noreferrer noopener"> 23andme.com/lung-cancer</a>.</p>



<p>Interested researchers can begin the data access request process by contacting TWP study program manager Caitlin Nichols at <a href="mailto:caitlin@twphilanthropies.org">caitlin@twphilanthropies.org</a>.&nbsp;</p>



<p></p>


Illustration of lungs on a background with a larger illustration of lungs

Powerful New Tool Opens Lung Cancer Data for Research Breakthroughs


<p><strong>Health Huddle LIVE from New Orleans</strong> brought together top athletes, medical professionals, and community leaders for powerful conversations on health, genetics, and early detection. Hosted at <strong>Dillard University during Super Bowl Week</strong>, the event was part of 23andMe’s <strong>Community Health Huddle</strong>, featuring expert panels and free health screenings.<br></p>



<p><strong>Watch the Highlights</strong>: </p>



<figure class="wp-block-embed alignwide is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio"><div class="wp-block-embed__wrapper">
<iframe loading="lazy" title="The 23andMe Health Huddle: Live from New Orleans" width="500" height="281" src="https://www.youtube.com/embed/5hOR4o5PkAU?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
</div></figure>



<h2 class="wp-block-heading" id="h-experts-athletes-amp-actionable-insights"><strong>Experts, Athletes &amp; Actionable Insights</strong></h2>



<p>Panelists included <strong>Dr. Jen Caldwell, Dr. Joel Bervell</strong>, and <strong>Dr. Mathew Knowles</strong>—a breast cancer survivor and 23andMe Global Brand Ambassador—who shared personal stories and insights on <strong>health disparities, preventive medicine, and genetic testing</strong>. They were joined by <strong>NFL Total Health Ambassadors</strong>, highlighting how genetic insights shape performance, recovery, and longevity in sports.</p>



<h2 class="wp-block-heading" id="h-key-takeaways"><strong>Key Takeaways</strong></h2>



<ul class="wp-block-list">
<li><strong>Genetic Testing Saves Lives</strong> – Understanding your genetic risks enables <strong>early detection and prevention</strong>, reducing the burden of chronic diseases.<br></li>



<li><strong>Your Family History is Your Health Roadmap</strong> – What runs in your family <strong>doesn’t have to define your future</strong>, but knowing your risks empowers healthier decisions.<br></li>



<li><strong>Health Inequities Must Be Addressed</strong> – <strong>Underserved communities</strong> continue to lack access to vital genetic and preventive care. This must change.<br></li>



<li><strong>Athletes Rely on Science to Perform &amp; Recover</strong> – The same genetic insights that help pros <strong>optimize their health</strong> can help everyone make more informed health choices.</li>
</ul>



<h2 class="wp-block-heading" id="h-beyond-the-event-driving-change"><strong>Beyond the Event: Driving Change</strong></h2>



<p>Health Huddle LIVE reinforced a core truth: <strong>genetic insights aren’t just about ancestry—they’re a tool for taking control of your health and advocating for better healthcare access</strong>. By bringing together medicine, sports, and community leadership, 23andMe continues to lead the movement for <strong>health equity and empowerment</strong>.</p>



<p><br>#HealthHuddleLIVE #GeneticHealth #CommunityWellness</p>


Inside Health Huddle LIVE: Athletes, Experts & Doctors on Longevity, Genetics & Wellness


<p>September is Sickle Cell Awareness Month, which offers us another chance to highlight some of the work 23andMe and its collaborators have done over the years.</p>



<p>Earlier this month, researchers from 23andMe,<a target="_blank" href="https://www.nih.gov/" rel="noreferrer noopener"> the the National Institutes of Health</a>, and <a target="_blank" href="https://www.hopkinsmedicine.org/som/" rel="noreferrer noopener">Johns Hopkins University School of Medicine</a> published new data on the association between sickle cell trait and blood clots. The new findings highlight the importance of this ongoing research and our overall efforts to illuminate this condition.</p>



<p>At 23andMe, knowledge is power, and understanding risks offers people opportunities to mitigate them.&nbsp;</p>



<h2 class="wp-block-heading" id="h-awareness-and-research"><strong>Awareness and Research</strong></h2>



<p>But more than that, 23andMe also offers a unique research model that allows individuals to learn about their genetic likelihood of developing a condition and participate in innovative genetic research that could potentially find new treatments.</p>



<p>As part of our <a href="http://www.23andme.com/sickle-cell" target="_blank" rel="noreferrer noopener">Sickle Cell Carrier Status Awareness Program</a>, 23andMe has collaborated with academics and advocacy organizations to increase <a href="https://blog.23andme.com/articles/sickle-cell-awareness-2">understanding of sickle cell</a>. In addition, we’re providing resources for those with sickle cell trait and sickle cell disease. With the help of the<a href="https://www.sicklecellga.org/" target="_blank" rel="noreferrer noopener"> Sickle Cell Foundation of Georgia, Inc. (SCFG)</a>,<a href="https://www.btsscycle.org/" target="_blank" rel="noreferrer noopener"> Breaking the SSickle Cell Cycle</a>,<a href="https://www.sc101.org/" target="_blank" rel="noreferrer noopener"> Sickle Cell 101</a>, and the<a href="https://www.msm.edu/" target="_blank" rel="noreferrer noopener"> Morehouse School of Medicine</a>, we’re working with Black communities to promote awareness. </p>



<p>We are not alone in this effort. Recently, the NBA, the WNBA, and Wilson Sporting Goods began the #IBall4SickleCell social media campaign to raise awareness. The groups participating in the effort are Breaking the SSickle Cell Cycle, the American Red Cross of Tennessee, and New York Presbyterian’s Dalio Center for Health Justice. Learn more about sickle cell, the campaign, and how to help<a href="https://www.sicklecellball.com/" target="_blank" rel="noreferrer noopener"> here</a>. </p>



<p>From all this work and research, we have learned much about sickle cell and the people it impacts most. However, much work is still needed to improve people’s understanding of sickle cell.</p>



<h2 class="wp-block-heading" id="h-more-on-sickle-cell-anemia-sickle-cell-trait"><strong>More on Sickle Cell Anemia, Sickle Cell Trait</strong></h2>



<p>Although many people have heard of sickle cell, often they do not know the difference between sickle cell trait and sickle cell anemia.</p>



<p>To have sickle cell anemia, one must inherit two copies of the HbS variant in the HBB gene—one copy from each biological parent. Typical signs and symptoms include anemia, pain episodes, and frequent infection.</p>



<p>People with just one copy of the HbS variant are called carriers. They’re also said to have <a target="_blank" href="https://www.cdc.gov/ncbddd/sicklecell/traits.html" rel="noreferrer noopener">sickle cell trait</a>. People with sickle cell trait are not expected to have sickle cell anemia. They typically do not experience any health complications. However, in rare cases, people with the sickle cell trait may experience some health impacts. Current research, including our study, is underway to understand better and spread awareness about the complications someone with SCT may experience.</p>



<p>Importantly, carriers can pass their variant on to their future children. If their partner has the HbS variant or another variant in the HBB gene, there’s a 25 percent chance that each child may have sickle cell anemia or a related blood disorder.&nbsp;&nbsp;</p>



<h2 class="wp-block-heading" id="h-23andme-s-sickle-cell-anemia-carrier-status-report"><strong>23andMe’s Sickle Cell Anemia Carrier Status Report**</strong></h2>



<p>23andMe’s<a target="_blank" href="https://www.23andme.com/topics/carrier/sickle-cell-anemia/" rel="noreferrer noopener"> Sickle Cell Anemia Carrier Status Report</a>, which meets FDA requirements for clinical and analytical validity, looks at the HbS variant in the HBB gene linked to sickle cell anemia.</p>



<p>Sickle cell anemia is the most severe form of sickle cell disease. Three hundred million people worldwide and one in 13 Black and African Americans in the United States have sickle cell trait, making them carriers for sickle cell anemia.</p>



<p>In addition to informing people if they have one copy of the HbS variant and are carriers for sickle cell anemia, <a href="https://blog.23andme.com/articles/23andme-updates-carrier-status-report-on-sickle-cell-anemia">23andMe’s report </a>can also tell individuals if they have two copies of the tested variant and if they are at risk of developing symptoms. However, the report does not describe one’s overall risk of developing symptoms. </p>



<p>Because the HbS variant is more common in certain populations, the Sickle Cell Anemia report is most relevant to people of African, Middle Eastern, and South Asian descent, as well as people from the Caribbean, the Mediterranean, and parts of Central and South America.</p>



<p>23andMe Health + Ancestry Service customers and 23andMe+ Premium members can see their <a target="_blank" href="https://you.23andme.com/reports/carrier.sickle_cell_anemia/" rel="noreferrer noopener">Sickle Cell Anemia report here</a>.&nbsp;</p>



<p>Not yet a customer? Learn more about <a target="_blank" href="https://www.23andme.com/compare-dna-tests/?_gl=1*11ns9j4*_ga*OTk4NDAyMjA3LjE3MTgzODA2MTg.*_ga_G330GF3ZFF*MTcyNTQxNDcyOS4xNjQuMS4xNzI1NDE0Nzk4LjAuMC4w" rel="noreferrer noopener">all that 23andMe offers here</a>.</p>



<hr class="wp-block-separator has-alpha-channel-opacity"/>



<h2 class="wp-block-heading" id="h-note"><strong>Note:</strong></h2>



<p>*<em>*The 23andMe PGS test uses qualitative genotyping to detect select clinically relevant variants in the genomic DNA of adults to report carrier status and reporting and interpreting genetic health risks. The relevance of each report may vary based on ethnicity. Our carrier status reports can be used to determine carrier status but cannot determine if you have two copies of any genetic variant. These carrier reports are not intended to tell you anything about your risk for developing a disease in the future, the health of your fetus, or your newborn child’s risk of developing a particular disease later in life. We provide a single report for certain conditions that includes information on carrier status and genetic health risk. For important information and limitations regarding other genetic health risk reports and carrier status reports, click <a target="_blank" href="https://www.23andme.com/test-info/" rel="noreferrer noopener">here</a>.</em></p>


An illustration for 23andMe's Sickle Cell Carrier Statues Awareness Program.

Learn More About Our Research and Collaborations During Sickle Cell Awareness Month

<p><b><i>Editor&#8217;s note 7/8/2024:</i></b><i> This post has been updated since 2020. In addition, We do not support uploading DNA data obtained from other testing services to 23andMe. This article explains the risks of uploading your DNA data to third party services.</i></p>
<p>With all of <a class="waffle-rich-text-link" href="https://www.23andme.com/compare-dna-tests/">23andMe&#8217;s services</a>, you’re in charge of your genetic data. That means we let you decide what information you want to learn and what information you want to share. However, you need to be informed about the risks of sharing your genetic data with other services. <strong>This includes understanding the implications if you decide to upload DNA to 23andMe or any third-party service.</strong></p>
<p>After receiving <a class="waffle-rich-text-link" href="https://www.23andme.com/dna-reports-list/">personalized genetic reports</a> from 23andMe, customers can choose to download their raw DNA data. Some customers may do this to upload their data to third-party services, which offer to interpret their raw DNA data to find new genetic relatives or get additional genetic reports. However, 23andMe cannot vouch for the scientific validity or accuracy, or clarity in communication of results of any such third-party services. In fact, only 23andMe offers a consumer genetic test with health reports that have FDA&#8217;s independent assurance of validity and clear results (without requiring a prescription).</p>
<p>Beyond concerns about scientific validity, uploading your raw DNA data to a third-party service can also put <a href="https://www.23andme.com/privacy/">your data privacy</a> at risk. In part, this is why 23andMe provides important warnings to its customers before they choose to download.</p>
<h2><b>What are some of the risks of uploading your DNA data to a third-party website? </b></h2>
<p><div id="attachment_27862" style="width: 310px" class="wp-caption alignright"><a href="https://blog.23andme.com/articles/how-to-be-careful-with-your-raw-dna-data/what-is-dna-upload" rel="attachment wp-att-27862"><img loading="lazy" decoding="async" aria-describedby="caption-attachment-27862" class="size-medium wp-image-27862" src="http://35.88.189.111/wp-content/uploads/2020/01/What-is-DNA-Upload-300x128.jpg" alt="An illustration of the steps for downloading data." width="300" height="128" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2020/01/What-is-DNA-Upload-300x128.jpg 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2020/01/What-is-DNA-Upload.jpg 512w" sizes="auto, (max-width: 300px) 100vw, 300px" /></a><p id="caption-attachment-27862" class="wp-caption-text"><em>Most consumer genetics companies, including 23andMe, allow you to download your own raw DNA data. At that point, the customer is free to do what they like with their raw DNA data, such as deciding to upload that raw DNA data to third-party services.</em></p></div></p>
<p>At 23andMe, we’re clear with our users about the risks of using third-party services that provide additional health, wellness or trait insights. This is because only select genotype data used specifically in our Health reports have been individually validated for accuracy. While the rest of your data has undergone a general quality review, it has not been validated to the extent of the data underlying our official 23andMe reports. As a result, raw DNA data should not be used for medical purposes and we do not recommend the use of third-party services that claim to interpret raw DNA data to provide health information.</p>
<p>Consumers also cite concerns about law enforcement uploading crime-scene DNA data to third-party services to crack a cold case. Simply put, uploading crime-scene DNA data into the 23andMe environment is not possible because we do not support the upload of DNA data that has been processed by a third-party laboratory.</p>
<p>Further, 23andMe’s <a href="https://www.23andme.com/transparency-report/">Transparency Report</a> details our policy against releasing customer’s individual DNA data to any third party &#8211; including law enforcement &#8211; without receiving the customer’s explicit consent, unless required by law.</p>
<p>However, this concern about law enforcement upload of crime scene DNA data is a real one that we warn customers about should they choose to upload their DNA data to other third party platforms, including public genealogy services or other third party services that facilitate DNA data upload.</p>
<p>But there’s another form of vulnerability that’s less well-understood: Within databases that allow for raw DNA data uploads with access to relative matching features, people with malicious intent can upload real or fake “<a href="https://en.wikipedia.org/wiki/Trojan_horse_(computing)">Trojan Horse</a>” genetic profiles for access to your personal identifying information. They could even infer your specific DNA variants—such as information about any disease risk variants you might carry. <strong>This is one reason why we don&#8217;t support uploading DNA to 23andMe.</strong></p>
<h2>How can that happen?</h2>
<ul>
<li>Many relative-matching services allow you to see the exact section or sections of DNA you share with each relative.*</li>
<li>If uploading DNA data is allowed, it means you no longer know for sure that your relative’s profile is actually controlled by your relative, and <b>a malicious actor could upload real or fake DNA data to deduce information about you based on sections of matching DNA</b>, including any disease risk variants you might have.</li>
<li>Even if shared segments aren’t shown, there are still ways that people with malicious intent can deduce some of your DNA variants.</li>
</ul>
<p><img loading="lazy" decoding="async" class="size-medium wp-image-27863 alignright" src="https://blog-api.23andme.com/wp-content/uploads/2020/01/How-Uploading-Creates-Risk-300x202.jpg" alt="" width="300" height="202" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2020/01/How-Uploading-Creates-Risk-300x202.jpg 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2020/01/How-Uploading-Creates-Risk.jpg 512w" sizes="auto, (max-width: 300px) 100vw, 300px" /></p>
<p>This vulnerability was recently described in two reports: one at the University of Washington and another at the University of California, Davis. The authors of these reports explain several ways an “adversary” can deduce people&#8217;s genotypes “either at key positions or at many sites genome-wide” in databases that allow DNA data uploads with relative matching. <strong>This highlights the risks associated with uploading DNA to 23andMe or similar services.</strong></p>
<p>Both reports outline specific ways for services to mitigate risk, such as limiting the information displayed in relative-matching features.</p>
<p>While these practices may reduce risk, we believe the simplest and most effective defense is to not allow individuals genotyped through other testing services to upload their DNA data to 23andMe for the purpose of discovering genetic relatives.</p>
<p>In the past, 23andMe has allowed DNA uploads from other consumer genetic testing services in very specific circumstances. Specifically, on DNA Day in April 2018, 23andMe allowed individuals who tested at other companies to upload their results to access a subset of our trait reports, but 23andMe has not enabled the discovery of new relatives for these accounts.</p>
<h2><b>How does 23andMe ensure that only real, consenting individuals participate in our service? </b></h2>
<p>In a word, spit.</p>
<p>When you spit into the tube, you’re embarking on the adventure of a lifetime. You’re also trusting 23andMe with some of your most personal information.</p>
<p>Requiring a saliva sample is how 23andMe is able to verify that you’re a real person who chose to participate in the service. While it might be easy to upload fake DNA data, it’s another matter entirely to fake a spit sample, which requires filling a tube with more than two milliliters of spit. It’s how you know that “<i>Linda-your-4th-cousin-who-you-didn’t-know-existed</i>” is a real person who chose to do 23andMe. Linda had to spit in a tube, too.</p>
<h2><b>What are some key questions you should ask?</b></h2>
<p>When considering whether or not to upload your raw DNA data to another website, we encourage you to familiarize yourself with their privacy and security policies <b>before</b> you upload your raw DNA data.</p>
<p>Make sure to consider the following questions:</p>
<ol>
<li>Before you upload your DNA data, ask yourself: do I really need to do this? Am I willing to risk the security and privacy of my DNA data by uploading it to a third-party service?</li>
<li>Do your research! Does the third-party service have a track record of strong privacy and data security?</li>
<li>How will the third-party service use your information?  How can your information be further shared with other third parties?</li>
<li>If you are not interested in discovering new relatives but you want additional DNA insights, does the other service explicitly exclude features relating to discovering genetic relatives?</li>
</ol>
<p><i>An earlier article detailing our stance on protecting customers’ data is available </i><a href="https://blog.23andme.com/news/our-stance-on-protecting-customers-data/"><i>here</i></a><i>. </i></p>
<h2>Learn More</h2>
<p>Find out if your <a href="https://www.23andme.com/test-info/genetic-health/">genetics</a> might Increase your risk for any health conditions with 23andMe.</p>
<p>You can also Learn more about common risks associated with uploading raw DNA online and how to protect your DNA information.</p>
<p><strong>*<i>By default, 23andMe does not display your ancestry information or DNA segment information to relatives or connections until you decide to share it with them.  </i></strong></p>


Can You Upload DNA Data to 23andMe? 


<h5 class="wp-block-heading" id="h-fda-now-recommends-genetic-testing-before-prescribing-specific-chemotherapy-medications">FDA Now Recommends Genetic Testing Before Prescribing Specific Chemotherapy Medications</h5>



<p>For years, patient advocates have been calling for stronger safeguards against preventable toxicity from chemotherapy. Last week, the FDA took a major step forward, updating the label for a drug called <a href="https://medlineplus.gov/druginfo/meds/a699003.html" target="_blank" rel="noreferrer noopener">capecitabine</a> to explicitly recommend testing for variants in the <em>DPYD</em> gene before starting treatment. This is more than just a label change—it&#8217;s a long-awaited acknowledgment that genetics matter when it comes to patient safety.</p>



<h2 class="wp-block-heading">What is <em>DPYD?</em></h2>



<p>The <a href="https://medlineplus.gov/genetics/gene/dpyd/" target="_blank" rel="noreferrer noopener"><em>DPYD</em> gene</a> provides instructions for making an enzyme called DPD (dihydropyrimidine dehydrogenase), which helps the body break down certain chemotherapy drugs like capecitabine and <a href="https://medlineplus.gov/druginfo/meds/a682708.html" target="_blank" rel="noreferrer noopener">5-fluorouracil</a>. These medications are commonly used to treat breast, colorectal, and other cancers. People with certain changes in this gene may not process these drugs properly, causing the drugs to build up in the body and, in some cases, leading to severe or even life-threatening <a href="https://medlineplus.gov/genetics/condition/dihydropyrimidine-dehydrogenase-deficiency/" target="_blank" rel="noreferrer noopener">reactions</a>.</p>



<figure class="wp-block-image alignleft size-full is-resized"><img loading="lazy" decoding="async" width="508" height="531" src="http://35.88.189.111/wp-content/uploads/2025/10/drug-bottle.png" alt="" class="wp-image-34304" style="width:126px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/drug-bottle.png 508w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/drug-bottle-287x300.png 287w" sizes="auto, (max-width: 508px) 100vw, 508px" /></figure>



<p>These reactions can include painful mouth sores, severe diarrhea, low white blood cell counts, and nerve problems. <a href="https://medlineplus.gov/genetics/condition/dihydropyrimidine-dehydrogenase-deficiency/#frequency" target="_blank" rel="noreferrer noopener">Up to 8%</a> of people have a variant in the <em>DPYD</em> gene that affects how well they process these medications. Sadly, some patients with <em>DPYD</em> variants have died after receiving these drugs. Such experiences have fueled years of advocacy calling for genetic testing <em>before</em> treatment, not after. </p>



<h2 class="wp-block-heading" id="h-a-change-in-the-recommendations">A change in the recommendations</h2>



<p>Until now, the FDA advised doctors they could &#8220;consider testing&#8221; patients before giving capecitabine or similar drugs. The <a href="https://www.accessdata.fda.gov/drugsatfda_docs/label/2025/020896s052lbl.pdf" target="_blank" rel="noreferrer noopener">new label</a> goes much further, adding a warning that says, <em>&#8220;serious adverse reactions or death may occur in patients with complete DPD deficiency&#8221;</em> and telling doctors to test for <em>DPYD</em> variants before prescribing the medication. (Experts predict a similar change to the 5-fluorouracil drug label soon.) It&#8217;s a major win for patient safety and for the <a href="https://test4dpd.org/" target="_blank" rel="noreferrer noopener">advocacy groups</a> who have pushed tirelessly for this change. Organizations that have long advocated for universal DPYD testing hope this update will encourage hospitals and cancer centers across the U.S. to make pretreatment genetic testing standard care.</p>



<figure class="wp-block-image alignright size-large is-resized"><img loading="lazy" decoding="async" width="790" height="1024" src="http://35.88.189.111/wp-content/uploads/2020/09/PGt-Home-790x1024.png" alt="23andMe mobile pharmacogenomics" class="wp-image-28527" style="width:256px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2020/09/PGt-Home-790x1024.png 790w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2020/09/PGt-Home-231x300.png 231w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2020/09/PGt-Home-768x996.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2020/09/PGt-Home-679x880.png 679w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2020/09/PGt-Home-910x1180.png 910w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2020/09/PGt-Home.png 1583w" sizes="auto, (max-width: 790px) 100vw, 790px" /></figure>



<p>We share the belief that genetic insights can empower individuals and help improve outcomes. The 23andMe<sup>®</sup> <a href="https://www.23andme.com/topics/pharmacogenetics/dpyd/" target="_blank" rel="noreferrer noopener"><strong>DPYD Drug Metabolism Pharmacogenetics report</strong></a><strong>*</strong>, available to <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a>™ members, provides information about two variants associated with reduced DPD enzyme activity. While this report isn&#8217;t a substitute for clinical testing, it can help people learn whether they carry certain <em>DPYD</em> variants and start a conversation with their healthcare provider. </p>



<p>The FDA&#8217;s new label is an important step toward safer, more personalized cancer treatment and a long-awaited victory for the patients and advocates who made their voices heard.</p>



<hr class="wp-block-separator has-alpha-channel-opacity"/>



<p><br>* <em>23andMe PGS Pharmacogenetics reports: The 23andMe test uses qualitative genotyping to detect 3 variants in the CYP2C19 gene, 2 variants in the DPYD gene and 1 variant in the SLCO1B1 gene in the genomic DNA of adults from saliva for the purpose of reporting and interpreting information about the processing of certain therapeutics to inform discussions with a healthcare professional. It does not describe if a person will or will not respond to a particular therapeutic. Our CYP2C19 Pharmacogenetics report provides certain information about variants associated with metabolism of some therapeutics and provides interpretive drug information regarding the potential effect of citalopram and clopidogrel therapy. Our SLCO1B1 Pharmacogenetics report provides certain information about variants associated with the processing of some therapeutics and provides interpretive drug information regarding the potential effect of simvastatin therapy. Our DPYD Pharmacogenetics report does not describe the association between detected variants and any specific therapeutic. Results for DPYD and certain CYP2C19 results should be confirmed by an independent genetic test prescribed by your own healthcare provider before taking any medical action. Warning: Test information should not be used to start, stop, or change any course of treatment and does not test for all possible variants that may affect metabolism or protein function. The PGS test is not a substitute for visits to a healthcare professional. Making changes to your current regimen can lead to harmful side effects or reduced intended benefits of your medication, therefore consult with your healthcare professional before taking any medical action. For important information and limitations regarding Pharmacogenetic reports, visit </em><a href="http://23andme.com/test-info/pharmacogenetics/" target="_blank" rel="noreferrer noopener"><em>23andme.com/test-info/pharmacogenetics/</em></a><em> </em></p>


A Big Step Forward for Patient Safety


<p>Late in the first quarter in only his third game this season, one professional football team’s star edge-rusher limped off the field, gesturing to his trainers with his thumb down. Apparently, he already knew what he&#8217;d find out a short time later with an MRI: he&#8217;d again torn his ACL, the anterior cruciate ligament.</p>



<p>While a hard tackle or awkward fall can tear an ACL, some people may be more prone to an ACL tear than others, and their genetics may explain why.</p>



<p>A new 23andMe polygenic risk score (PRS) report sheds light on that genetic connection. The report examines how a person&#8217;s genetics may impact their likelihood of experiencing an ACL tear, an injury particularly common among those involved in high-impact sports.</p>



<h2 class="wp-block-heading" id="h-how-genetics-may-influence-acl-tear-risk">How Genetics May Influence ACL Tear Risk</h2>



<p>First, it&#8217;s important to note that your genetics is only one part of the story – many other factors can influence the risk of an ACL tear. </p>



<figure class="wp-block-image alignright size-full"><img loading="lazy" decoding="async" width="306" height="126" src="http://35.88.189.111/wp-content/uploads/2025/10/ACL-tear-PRS-Hero.png" alt="" class="wp-image-34316" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/ACL-tear-PRS-Hero.png 306w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/10/ACL-tear-PRS-Hero-300x124.png 300w" sizes="auto, (max-width: 306px) 100vw, 306px" /></figure>



<p>Tears typically occur when the knee twists or extends beyond its normal range, often seen in sports that involve jumping and sudden stops, pivots, or changes in direction. That might be in sports such as football, soccer, basketball, or downhill skiing. The ACL is the most commonly injured ligament in the knee.&nbsp;&nbsp;</p>



<p>We also know that ACL tears are more common in female athletes. However, because more males participate in high-risk sports, the total number of ACL tears may actually be higher in males. They are also more likely in people with a family history of an ACL injury or a personal history of an ACL tear. Indeed, genetics plays an important role, with one 2020 sports medicine journal study estimating the <a href="https://bjsm.bmj.com/content/55/7/385" target="_blank" rel="noreferrer noopener">genetic contribution to an ACL tear at approximately 69 percent</a>. </p>



<p>While the exact biological mechanism involved is not yet known, the genetic associations do offer some hints. Among the many genetic variants associated with ACL tears are variants in or near genes involved in the formation of collagen, a building block for ligaments. Scientists have discovered other variants linked to tears, but most of those associations are inconclusive, and more research is needed.&nbsp;</p>



<h2 class="wp-block-heading" id="h-23andme-s-new-acl-tear-prs-report">23andMe&#8217;s New ACL Tear PRS Report</h2>



<p>Knowing how genetics influences the risk for an ACL tear can empower athletes, who are at the highest risk, train smarter and work toward preventing them.&nbsp;</p>



<p>To create the new ACL Tear PRS Report* 23andMe scientists analyzed data from people who consented to participate in research to identify thousands of variants associated with ACL tears. The 23andMe scientists then created a genetic model that incorporated those variants to calculate the genetic likelihood of an ACL tear.</p>



<p>This PRS report, like other 23andMe PRS reports, is research-based and not validated for medical diagnostic use; it may have limitations for people with mixed or less-studied ancestries and does not account for every possible factor influencing ACL health. In addition, polygenic risk scores integrate many common variants, but they do not account for rare genetic variants or lifestyle factors that can heavily impact risk.&nbsp;</p>



<p>For individuals with an elevated genetic or family risk, creating a personalized prevention plan and scheduling regular check-ins with sports medicine professionals are great ways to keep knees healthy.&nbsp;</p>



<h2 class="wp-block-heading" id="h-mitigating-the-risk-of-acl-tears">Mitigating the Risk of ACL Tears</h2>



<p>Whether you’re a pro athlete or not, and especially if you’ve already had an ACL tear before, proper training and technique&nbsp; are simple ways to help lower the likelihood of injury.</p>



<p>Here are a few things you can do to help lower the risk of an ACL tear:</p>



<ul class="wp-block-list">
<li>Build muscle strength in the hamstrings, and core to stabilize the knee.</li>



<li>Maintain proper technique for movements such as jumping, pivoting, and squatting — like landing on the balls of your feet with knees bent and keeping knees aligned over your toes.</li>



<li>Warm up and cool down before and after physical activity to increase flexibility.</li>



<li>Wear supportive, activity-appropriate footwear for correct alignment.</li>



<li>Consulting with physical therapists or trainers for form and strength assessments can further reduce the risk, regardless of one&#8217;s genetic background.</li>
</ul>



<p>We continue to learn about the role genetics plays in sports-related injuries, including ACL tears, but genetics is just one factor.&nbsp;</p>



<h2 class="wp-block-heading" id="h-learn-more">Learn More</h2>



<p><a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a>™ members can view this report with their other Wellness reports.</p>



<p><a href="https://you.23andme.com/" target="_blank" rel="noreferrer noopener">Sign in</a> to learn more about what 23andMe&#8217;s ACL Tear PRS can tell you.<br></p>



<p><em>* The 23andMe ACL Tear PRS report is based on a genetic model that includes data and insights from 23andMe consented research participants and incorporates more than 6,000 genetic variants to provide information on the likelihood of experiencing an ACL tear. The report does not describe a person’s overall likelihood, does not account for lifestyle or family history and has not been reviewed by the US Food and Drug Administration. The ACL Tear PRS report is not intended to tell you anything about your current state of health, or to be used to make medical decisions or determine any treatment.</em></p>


Genetics May Explain Why Some Athletes Are More Prone to ACL Tears


<p><em>As many as one in 10 women have endometriosis, but diagnosing it can take up to a decade or more. Dive into the science, and learn a bit about a new 23andMe Endometriosis report that looks at the genetic likelihood of developing this painful condition</em>.</p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="612" height="252" src="http://35.88.189.111/wp-content/uploads/2025/09/endometriosis_hero-1.jpg" alt="" class="wp-image-34227" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/endometriosis_hero-1.jpg 612w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/endometriosis_hero-1-300x124.jpg 300w" sizes="auto, (max-width: 612px) 100vw, 612px" /></figure>



<p>Have you ever been told your debilitating period pain is &#8220;normal&#8221;? Do you find yourself planning your life around your cycle, canceling plans, or missing work or school due to pain, heavy bleeding, or exhaustion? If so, you&#8217;re not alone; these symptoms could point to endometriosis, a common, yet often misunderstood, condition.</p>



<p>For those with endometriosis, tissue similar to the lining of the uterus grows in other places, like the ovaries, fallopian tubes, or even the bowel and bladder. This can lead to severe pain, heavy periods, and in some cases, may make it harder to become pregnant (between 30–50% of women with endometriosis experience infertility).</p>



<p>If this sounds familiar, it’s important to know that your pain is real and more common than many people think. Endometriosis affects as many as 10% of women in the U.S. Despite this, the journey to a diagnosis can be frustratingly long, sometimes <a href="https://pubmed.ncbi.nlm.nih.gov/39373298/" target="_blank" rel="noreferrer noopener">taking up to 12 years</a>. This delay often happens because symptoms are dismissed as &#8220;just a bad period.&#8221;</p>



<p>To support awareness and help people understand their genetic predisposition to endometriosis, we’ve launched the new Endometriosis* report for female <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a>™ and <a href="https://www.23andme.com/total-health/" target="_blank" rel="noreferrer noopener">Total Health</a>™ members.</p>



<h2 class="wp-block-heading" id="h-what-causes-endometriosis">What causes endometriosis?</h2>



<p>While the exact cause isn&#8217;t known, several factors can increase your likelihood of developing endometriosis:</p>



<figure class="wp-block-image alignright size-full is-resized"><img loading="lazy" decoding="async" width="612" height="720" src="http://35.88.189.111/wp-content/uploads/2025/09/Group-125628.png" alt="" class="wp-image-34211" style="width:259px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/Group-125628.png 612w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/09/Group-125628-255x300.png 255w" sizes="auto, (max-width: 612px) 100vw, 612px" /></figure>



<ul class="wp-block-list">
<li><strong>Age</strong>: It most often affects menstruating people and is frequently diagnosed in the 30s and 40s.</li>



<li><strong>Family history</strong>: Having a family member with endometriosis increases risk.</li>



<li><strong>Reproductive history</strong>: Starting menstruation at a young age, experiencing menopause later in life, and having frequent or heavy periods (short cycles or bleeding lasting more than 7 days) can all increase chances of developing the condition.</li>
</ul>



<p>These factors are associated with a higher risk. On the other hand, having been pregnant or breastfeeding may reduce risk.</p>



<h3 class="wp-block-heading" id="h-the-genetic-connection">The genetic connection</h3>



<p>Endometriosis is what’s known as a <a href="https://www.genome.gov/genetics-glossary/Polygenic-Trait" target="_blank" rel="noreferrer noopener">polygenic</a> condition — meaning that many different genetic variants in many different genes can influence a person’s chances of developing it. In fact, <a href="https://pubmed.ncbi.nlm.nih.gov/26209831/" target="_blank" rel="noreferrer noopener">research suggests</a> that genetics may explain nearly half of the differences in who develops endometriosis across a population.</p>



<p>In 2023, 23andMe collaborated with researchers at Oxford in what was at the time the largest study on <a href="https://blog.23andme.com/articles/largest-genetic-study-to-date-links-endometriosis-with-chronic-pain" target="_blank" rel="noreferrer noopener">endometriosis and its association with chronic pain</a>. Now, to further understand the genetics of this condition, researchers at 23andMe looked at genetic and self-reported data from more than 1.5 million consented research participants. Using this information, they created a Polygenic Risk Score (PRS) — a model that considers thousands of genetic variants to estimate a person’s likelihood of developing endometriosis.</p>



<p>However, this model did not perform as accurately for 23andMe customers with Black or African American ancestry. Due to this limitation, we cannot provide a result for the Endometriosis report to those customers at this time. This is an important reminder that genetics research has historically underrepresented many communities. With continued research and broader participation, we hope to improve this work and reduce these disparities in the future.</p>



<h2 class="wp-block-heading" id="h-what-you-can-do-about-it">What you can do about it</h2>



<p>While the road to getting a diagnosis and managing endometriosis can be long and frustrating, there are proactive steps you can take on your journey to getting answers and feeling better.</p>



<h3 class="wp-block-heading" id="h-advocate-for-yourself">Advocate for yourself</h3>



<p><strong>Track Your Symptoms.</strong> Before you see a doctor, consider starting a symptom diary. Being specific can make a big difference. Every day, note:</p>



<ul class="wp-block-list">
<li><strong>Pain:</strong> On a scale of 1–10, where is the pain, and what does it feel like (sharp, dull, cramping)?</li>



<li><strong>Timing:</strong> When during your cycle do you feel symptoms? (During your period, during ovulation, all month long?)</li>



<li><strong>Bleeding:</strong> How heavy is your flow? Are you passing clots?</li>



<li><strong>Other Symptoms:</strong> Note any bloating, painful bowel movements, pain with sex, or fatigue.</li>



<li><strong>Impact:</strong> How do these symptoms affect your daily life? (e.g., &#8220;Missed two days of work,&#8221; &#8220;Couldn&#8217;t exercise,&#8221; &#8220;Had to leave the party early.&#8221;)</li>
</ul>



<p><strong>Connect with a Doctor.</strong> Armed with your symptom diary, make an appointment with a healthcare provider.</p>



<ul class="wp-block-list">
<li>Be clear and confident. Say, &#8220;I am concerned I might have endometriosis because of these specific symptoms.&#8221;</li>



<li>Don&#8217;t be afraid to ask questions. &#8220;What are the next steps for diagnosis?&#8221; or &#8220;Could we explore treatment options for my pain now?&#8221;</li>



<li>If you feel dismissed, get a second opinion. Look for a gynecologist who specializes in endometriosis or pelvic pain.</li>
</ul>



<h3 class="wp-block-heading" id="h-manage-symptoms">Manage symptoms</h3>



<p>There’s no one-size-fits-all approach, but experts agree that certain lifestyle habits can make a difference:</p>



<ul class="wp-block-list">
<li><strong>Exercise</strong>: Activities like yoga can improve blood flow, relax muscles, and reduce pain.</li>



<li><strong>Relaxation and self-care</strong>: Rest, warmth on the lower stomach (like a heating pad, warm water bottle, or bath), and gentle movement can help ease discomfort.</li>
</ul>



<p>Medical options may include medications to manage pain and hormone levels, pelvic floor physical therapy, and in some cases, surgery. Because endometriosis tissue can respond to estrogen, symptoms may improve after menopause, when estrogen levels remain consistently low.</p>



<h2 class="wp-block-heading" id="h-take-the-next-steps">Take the next steps</h2>



<p>Endometriosis pain is not an exaggeration, and it deserves to be taken seriously. Seeking answers is the first and most powerful step toward managing your health and reclaiming your quality of life.</p>



<p>Ready to learn more about your health and genetics and take the next step in your journey? Learn more about <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a> or <a href="https://www.23andme.com/total-health/" target="_blank" rel="noreferrer noopener">Total Health</a> memberships.</p>



<p>Already part of 23andMe? <a href="https://you.23andme.com/" target="_blank" rel="noreferrer noopener">Sign in</a> to view this report with your other Health Predisposition reports or upgrade 23andMe+ Premium or Total Health memberships.</p>



<p><em>* The 23andMe Endometriosis PRS report is based on a genetic model that includes data and insights from 23andMe consented research participants and incorporates more than 13,000 genetic variants to provide information on the likelihood of developing endometriosis. The report does not describe a person’s overall likelihood, does not account for lifestyle or family history, and has not been reviewed by the US Food and Drug Administration. The Endometriosis PRS report is not intended to tell you anything about your current state of health, or to be used to make medical decisions or determine any treatment.</em><br></p>



<p><strong><em>NOTE:</em></strong><em> Within this blog post, we use the words &#8220;women&#8221; and &#8220;female&#8221; to refer to people whose sex assigned at birth is female. However, we recognize that not everyone who experiences endometriosis will identify as female, and being categorized by birth sex may be an uncomfortable experience for some people. We do not mean to delegitimize anyone’s gender identity. Learn more about why we made this decision in this </em><a href="https://customercare.23andme.com/hc/en-us/articles/360010964373-How-23andMe-Uses-Your-Genetic-Sex-Birth-Sex-and-Gender" target="_blank" rel="noreferrer noopener"><em>help article</em></a><em>.</em></p>


Could Your Painful Periods Be Endometriosis? Here’s What You Should Know


<p>This week, 23andMe added a new genetic report to help us all be more aware of an often overlooked contributor to health disparities.</p>



<figure class="wp-block-image alignright size-large is-resized"><img loading="lazy" decoding="async" width="1024" height="763" src="http://35.88.189.111/wp-content/uploads/2025/08/duffy-statistic-1024x763.png" alt="" class="wp-image-34101" style="width:309px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/08/duffy-statistic-1024x763.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/08/duffy-statistic-300x224.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/08/duffy-statistic-768x572.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/08/duffy-statistic-880x656.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/08/duffy-statistic-1180x879.png 1180w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/08/duffy-statistic.png 1224w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p><a href="https://pubmed.ncbi.nlm.nih.gov/35994632/" target="_blank" rel="noreferrer noopener">Nearly 70%</a> of Black and African Americans have two copies of a variant in the Duffy antigen gene that can cause them to have white blood cell (WBC) counts that are lower than most standard reference ranges.&nbsp;</p>



<p>People who have this genotype — called Duffy null status — do not have an increased risk for <a href="https://pubmed.ncbi.nlm.nih.gov/32959868/" target="_blank" rel="noreferrer noopener">infection</a> or <a href="https://pubmed.ncbi.nlm.nih.gov/39825822/" target="_blank" rel="noreferrer noopener">other health problems</a>. But they may be flagged incorrectly as having abnormally low WBC counts, which can negatively impact the healthcare they receive.&nbsp;</p>



<p><em><strong>&#8220;I&#8217;ve seen patients that are told that they might have cancer, go through painful bone marrow biopsies, miss out on joining clinical trials, or have critical medications like chemotherapy discontinued simply because their white blood cell counts were interpreted without understanding their Duffy status,&#8221;</strong></em> says Dr. Lauren Merz, Assistant Professor of Medicine, Division of Hematology/Oncology at the University of Michigan, who is leading efforts to raise awareness about Duffy null status and develop Duffy null-specific reference ranges and who provided expert feedback on 23andMe&#8217;s new report.</p>



<h2 class="wp-block-heading" id="h-when-a-one-size-fits-all-blood-test-falls-short">When a one-size-fits-all blood test falls short</h2>



<p>When we have our blood drawn, testing labs use reference ranges to determine whether our results fall in the range considered &#8220;normal&#8221; or are too high or too low, which can flag the need for clinical follow-up. One common blood test measures neutrophils, which are a type of white blood cell that helps the body fight infections.</p>



<p>Most neutrophil reference ranges are defined based on populations where Duffy null status is rare, such as people with European or Asian genetic ancestry. And blood testing labs don&#8217;t usually take into account Duffy status. As a result, <a href="https://pubmed.ncbi.nlm.nih.gov/35994632/" target="_blank" rel="noreferrer noopener">nearly 25%</a> of healthy Black and African Americans with Duffy null status — and more than 15% of <em>all</em> Black and African Americans — have neutrophil counts below the standard reference range.</p>



<p>These individuals may be misdiagnosed with neutropenia (low neutrophil counts), which can lead to a number of downstream harms, including <a href="https://pubmed.ncbi.nlm.nih.gov/34180972/" target="_blank" rel="noreferrer noopener">unnecessary specialty referrals and follow-up tests</a> like bone marrow biopsies; <a href="https://pubmed.ncbi.nlm.nih.gov/39259539/" target="_blank" rel="noreferrer noopener">exclusion from clinical trials</a> (because many trials require a minimum number of neutrophils that is higher than the normal range for people with the Duffy null genotype); and delayed or reduced access to medications for <a href="https://pubmed.ncbi.nlm.nih.gov/39259539/" target="_blank" rel="noreferrer noopener">cancer</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/34645395/" target="_blank" rel="noreferrer noopener">mental health conditions</a>, and <a href="https://pubmed.ncbi.nlm.nih.gov/35724382/" target="_blank" rel="noreferrer noopener">autoimmune disorders</a>. (<em>See the sidebar at the bottom for more details</em>.)</p>



<h2 class="wp-block-heading" id="h-what-is-the-duffy-antigen-and-how-does-it-impact-white-blood-cells">What is the Duffy antigen, and how does it impact white blood cells?</h2>



<figure class="wp-block-image alignleft size-large is-resized"><img loading="lazy" decoding="async" width="87" height="138" src="http://35.88.189.111/wp-content/uploads/2021/11/research.b57972a5e8fa.svg" alt="an icon representing research" class="wp-image-29284" style="width:117px;height:auto"/></figure>



<p>The Duffy antigen is a protein found on the surface of red blood cells and certain other cells in the body. People with two copies of a specific <a href="https://www.cincinnatichildrens.org/health/d/duffy-null-associated-neutrophil-count" target="_blank" rel="noreferrer noopener">genetic variant in the ACKR1 (Duffy antigen) gene</a> don&#8217;t express this protein on their red blood cells — giving rise to the name &#8220;Duffy null.&#8221;</p>



<p>Being Duffy null can also impact infection-fighting white blood cells called neutrophils. People who are Duffy null tend to have naturally lower levels of circulating neutrophils in the peripheral blood — <a href="https://pubmed.ncbi.nlm.nih.gov/37338884/" target="_blank" rel="noreferrer noopener">about 40% lower, on average</a>. But they don&#8217;t have an increased risk for infection, because the total number of neutrophils in their bodies remains the same. (Their neutrophils just move from the blood into other tissues like the spleen more easily.)</p>



<p>In the past, healthy people with low neutrophil counts were said to have &#8220;benign ethnic neutropenia,&#8221; because the Duffy null variant is more common in certain populations. But the preferred name is now <a href="https://www.cincinnatichildrens.org/health/d/duffy-null-associated-neutrophil-count" target="_blank" rel="noreferrer noopener">Duffy null-associated neutrophil count (DANC)</a>, as this refers to the biological driver of Duffy status rather than the social construct of race or ethnicity — and highlights that lower neutrophil counts are normal for people who are Duffy null.</p>



<h2 class="wp-block-heading" id="h-is-duffy-null-status-associated-with-any-health-conditions">Is Duffy null status associated with any health conditions?</h2>



<p>To date, there is no robust evidence that people with Duffy null status are at increased risk for any health conditions. In fact, a <a href="https://pubmed.ncbi.nlm.nih.gov/39825822/" target="_blank" rel="noreferrer noopener">recent, large phenome-wide association study (PheWAS)</a> — which looked for potential associations between the Duffy null variant and 1,400 possible health conditions using the National Institutes of Health&#8217;s All of Us initiative and other cohorts — did not report any associations with disease. However, this is an active area of research.</p>



<h2 class="wp-block-heading" id="h-why-is-duffy-null-status-most-common-in-certain-populations">Why is Duffy null status most common in certain populations?</h2>



<p>Although anyone can have Duffy null status, it is most common among people with African or Middle Eastern ancestry. In the U.S., two-thirds of people who identify as Black or African American have the Duffy null genotype, which means they do not express the Duffy antigen on their red blood cells.&nbsp;</p>



<p>Scientists believe this variant became common in certain populations because it <a href="https://pubmed.ncbi.nlm.nih.gov/21468018/" target="_blank" rel="noreferrer noopener">helps protect against <em>Plasmodium vivax</em></a>, a malaria parasite that relies on the Duffy antigen to infect red blood cells. (The variant does not protect against other types of malaria.) Over generations, people in regions where this malaria parasite was widespread were more likely to inherit this protective variant, and it remains common today in people with ancestry from some malaria-endemic regions.</p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="934" height="597" src="http://35.88.189.111/wp-content/uploads/2025/08/af_rs2814778_C.png" alt="" class="wp-image-34139" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/08/af_rs2814778_C.png 934w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/08/af_rs2814778_C-300x192.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/08/af_rs2814778_C-768x491.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/08/af_rs2814778_C-880x562.png 880w" sizes="auto, (max-width: 934px) 100vw, 934px" /><figcaption class="wp-element-caption"><em>23andMe data also show that the Duffy null genetic variant is most common in people with ancestry from parts of the world where Plasmodium vivax malaria is common.</em></figcaption></figure>



<h2 class="wp-block-heading" id="h-the-importance-of-raising-awareness">The importance of raising awareness</h2>



<p>Last year, the American Society of Hematology (ASH) launched the <a href="https://www.hematology.org/education/danc/danc-project" target="_blank" rel="noreferrer noopener">Absolute Neutrophil Count (ANC) by Duffy Status Project</a>, aimed at creating specific neutrophil reference ranges for people with the Duffy null genotype and advocating for broader awareness and testing.</p>



<p><strong><em>&#8220;The Duffy null genotype is a perfect example of how well-meaning systems can fall short when they don&#8217;t reflect the full diversity of the people they serve,&#8221; </em></strong>says Dr. Merz. <strong><em>&#8220;Raising awareness — among both clinicians and patients — is essential to prevent misdiagnosis and ensure more equitable and personalized care.&#8221;</em></strong></p>



<p>You can become your own advocate by learning about your Duffy status and sharing that information with your doctor.&nbsp;</p>



<p><em>The White Blood Cell Count (Duffy Antigen-Related) report is available to </em><a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener"><em>23andMe+ Premium™ members</em></a><em> with their other Wellness reports.</em></p>



<div style="float: left; text-align: justified; width: 700px; background-color: #eee; padding: 15px; margin-left: 5px;">
<p> 
<h3>A deeper dive: How lack of awareness of Duffy null status can lead to downstream harm</h3>
</p>
<p>
Although Duffy null status does not usually cause health problems, harms can arise when Duffy null individuals are misdiagnosed with abnormally low neutrophil counts. These harms can include:
<ul>
<li>
<b>Unnecessary follow-up testing.</b> In general, low neutrophil counts can prompt concern from doctors, because they can be caused by blood cancers like leukemia. Follow-up testing involves a bone marrow biopsy, which is an invasive and sometimes painful test. 
<br><br>Because their neutrophil counts may be naturally lower than standard reference ranges, people with Duffy null status are much more likely to receive <a href="https://pubmed.ncbi.nlm.nih.gov/34180972/" target="_blank" rel="noreferrer noopener">unnecessary bone marrow biopsies</a>. And one study reported that Duffy null status was the <a href="https://pubmed.ncbi.nlm.nih.gov/37419240/" target="_blank" rel="noreferrer noopener">most common reason</a> for children to be referred to a children&#8217;s hospital for low neutrophil counts.
</li>
<br>
<li>
<b>Exclusion from clinical trials.</b> Many chemotherapy drugs reduce WBC production, which can make patients more susceptible to infections. As a result, most cancer clinical trials require patients to have a minimum neutrophil count before starting the trial, to help keep patients safe. 
<br><br>But a recent study found that more than 75% of cancer clinical trials have neutrophil thresholds that <a href="https://pubmed.ncbi.nlm.nih.gov/39259539/" target="_blank" rel="noreferrer noopener">exclude some people with Duffy null status</a>. Researchers have suggested these exclusion criteria may be one reason that Black Americans are <a href="https://pubmed.ncbi.nlm.nih.gov/37477920/" target="_blank" rel="noreferrer noopener">less likely to be included in cancer clinical trials</a>.
</li>
<br>
<li>
<b>Delayed or reduced access to medications.</b> Because some medications reduce WBC production, patients often have their neutrophils counted before and during treatment, so that their clinicians can adjust the dose, delay the start of treatment, or discontinue medications if counts become too low. 
<br><br>Because people with Duffy null status tend to have lower starting neutrophil counts, they may experience reduced or delayed access to important medications for <a href="https://pubmed.ncbi.nlm.nih.gov/39259539/" target="_blank" rel="noreferrer noopener">cancer</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/34645395/" target="_blank" rel="noreferrer noopener">mental health conditions</a>, and <a href="https://pubmed.ncbi.nlm.nih.gov/35724382/" target="_blank" rel="noreferrer noopener">autoimmune disorders</a>, or inappropriate dose adjustments. Because chemotherapy dose often increases the chance of survival, some scientists think that inappropriate chemotherapy dosing related to Duffy null status could help explain, in part, why <a href="https://www.cancer.org/about-us/what-we-do/health-equity/cancer-disparities-in-the-black-community.html" target="_blank" rel="noreferrer noopener">breast cancer mortality is higher in Black than white Americans</a>.
</li>
</ul>
</p>
</div>


The Duffy Antigen Gene: A Clue Behind White Blood Cell Differences


<p>This August, we’re adding 23 new historical individuals whose genomes were studied as part of a large-scale investigation into one of Europe’s most iconic eras—the Viking Age (800–1050 CE).</p>



<h2 class="wp-block-heading" id="h-what-is-a-viking">What is a Viking?</h2>



<p>The term Vikings refers to seafaring people from Scandinavia (present-day Denmark, Sweden, and Norway) who lived between the late 8th and late 11th centuries. Renowned for their sailing skills and distinctive longships, Vikings traveled widely—raiding, trading, and settling far beyond their homelands. Their influence stretched from the North Atlantic and Baltic Sea to the Mediterranean, North Africa, the Middle East, and even as far as North America.</p>



<p>This period of exploration and expansion left lasting cultural and genetic legacies across Europe and beyond, which scientists can now explore through ancient DNA.</p>



<h2 class="wp-block-heading" id="h-studying-the-genetics-of-the-viking-age">Studying the Genetics of the Viking Age</h2>



<p>In 2020, <a href="https://pubmed.ncbi.nlm.nih.gov/32939067/" target="_blank" rel="noreferrer noopener">researchers sequenced the genomes of 442 individuals</a> from archaeological sites across Europe and Greenland dating to, or around, the Viking Age. The results revealed that Viking populations were genetically diverse and spread their ancestries into many regions. For example, the study found evidence of:</p>



<ul class="wp-block-list">
<li>Danish-like ancestry moving into England</li>



<li>Swedish-like ancestry reaching the Balkans</li>



<li>Norwegian-like ancestry influencing Ireland, Iceland, and Greenland</li>
</ul>



<h2 class="wp-block-heading" id="h-meet-some-of-the-newly-added-individuals">Meet Some of the Newly Added Individuals</h2>



<p>The 23 historical individuals we’re adding this month come from eight archaeological sites that span the wide geographic range touched by Vikings. Highlights include:</p>



<ul class="wp-block-list">
<li><strong>A 10th-century ship burial on Tomme Island, Norway.</strong> Excavated in 1910, this large earthen mound overlooked a natural harbor and contained a mid-10th century ship, the remains of two individuals, and rich grave goods, including weapons and jewelry.</li>



<li><strong>The Salme ship burials, Saaremaa, Estonia.</strong> First discovered in 2008 during construction work, the site revealed two ship burials. The first contained seven individuals; the second, 34. These burials likely held warrior-seafarers who died in an armed conflict during the Vendel Period (8th century), which directly preceded the Viking Age.</li>



<li><strong>An Icelandic church buried under volcanic ash.</strong> Archaeologists uncovered a mid-10th century hall, an associated cemetery, and a church in southern Iceland. Based on volcanic ash layers from eruptions of Katla volcano, all individuals buried here died before 1300 CE, when the site was completely covered.</li>
</ul>



<p>And more!</p>



<h2 class="wp-block-heading" id="h-learn-more">Learn more</h2>



<p>Want to see if you share a genetic connection with these newly added Viking Age individuals—or hundreds of other historical people? The <a href="https://blog.23andme.com/articles/23andmes-historic-matches" target="_blank" rel="noreferrer noopener">Historical Matches</a><sup>SM</sup> feature is available to <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a>™ members.</p>



<p></p>


New Historical Matches Could Connect You to Europe’s Viking Age


<p>This July, in honor of French-American Heritage Month, we’re adding four new individuals from early medieval France to our <a href="https://blog.23andme.com/articles/23andmes-historic-matches" target="_blank" rel="noreferrer noopener">Historical Matches</a><sup>SM</sup> feature.</p>



<h2 class="wp-block-heading" id="h-studying-the-demography-of-northern-france">Studying the Demography of Northern France</h2>



<p>In a <a href="https://www.nature.com/articles/s41467-024-51087-1" target="_blank" rel="noreferrer noopener">2024 study published in Nature Communications</a>, researchers sequenced the genomes of 3,234 present-day individuals from across northern France to explore the region’s population history. As part of this study, they also analyzed the DNA of six historical individuals who lived between the 4th and 11th centuries CE, recovered from archaeological sites in the Pays de la Loire region of northwestern France—four of whom had DNA of high enough quality to be added to the Historical Matches feature.</p>



<h2 class="wp-block-heading" id="h-northwestern-france-in-the-early-medieval-period">Northwestern France in the Early Medieval Period</h2>



<p>The period between the fall of the Western Roman Empire in the 5<sup>th</sup> century and the rise of the Carolingian Empire in the 9<sup>th</sup> century was one of major cultural and demographic transformations in northwestern France. While few written records survive, archaeological and linguistic evidence points to a region shaped by interactions with British, Irish, and Germanic populations. This study offers new genetic insights into this transitional period in history.</p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="1024" height="576" src="http://35.88.189.111/wp-content/uploads/2025/07/medieval_france-1024x576.png" alt="" class="wp-image-34036" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/medieval_france-1024x576.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/medieval_france-300x169.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/medieval_france-768x432.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/medieval_france-880x495.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/medieval_france-1180x664.png 1180w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/medieval_france.png 1600w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<h2 class="wp-block-heading" id="h-dna-reveals-migration-across-europe-and-beyond">DNA Reveals Migration Across Europe—and Beyond</h2>



<p>By studying the genomes of present-day and historical individuals, the research team uncovered strong genetic links between the people of northern France and of Great Britain and Ireland, supporting the idea that migration—not just trade or cultural exchange—connected these regions during the early Middle Ages.</p>



<p>The study also revealed regional differences in ancestry across northern France. For instance, people living north of the Loire River had more ancestry linked to Bronze Age populations from the Eurasian Steppe, introduced to western Europe around 2500 BCE with the spread of the Bell Beaker culture. In contrast, those south of the river retained more ancestry from earlier Neolithic farming populations.&nbsp;</p>



<p>While most of the historical individuals whose genomes were sequenced in this study were genetically similar to modern northern French populations, the research team was surprised to discover that one individual had recent North African ancestry. This finding highlights the fact that long-distance mobility and migration played a role in shaping the demography of northern France, even during the Medieval Period.</p>



<h2 class="wp-block-heading" id="h-learn-more">Learn More</h2>



<p>Want to see if you share a genetic connection with any of these newly added individuals from early medieval France—or to hundreds of other historical individuals? The Historical Matches feature is available to <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a>™ members.</p>



<p></p>


New Historical Matches Could Connect You to Early Medieval France


<p>We’re excited to announce an update to our 23andMe Ancestry Service adding greater detail for people with East Asian ancestry. We previously introduced Genetic Groups in <a href="https://blog.23andme.com/articles/new-genetic-groups-for-japan-and-scandinavia" target="_blank" rel="noreferrer noopener">Japan</a>, and now we&#8217;ve expanded our Genetic Groups in this region to include groups in China, Korea, and Mongolia. </p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="1024" height="724" src="http://35.88.189.111/wp-content/uploads/2025/07/east_asia-1024x724.png" alt="" class="wp-image-34028" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/east_asia-1024x724.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/east_asia-300x212.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/east_asia-768x543.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/east_asia-880x622.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/07/east_asia-1180x834.png 1180w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p>More than 70% of our customers with a majority of their ancestry from China, Korea, or Mongolia, who tested on our <a href="https://customercare.23andme.com/hc/en-us/articles/218392668-Upgrading-to-23andMe-s-Newest-Chip-Version" target="_blank" rel="noreferrer noopener">latest genotyping chip</a>, are expected to see a new match to at least one of these regions. And <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium™ members</a> will also be able to see any distant Genetic Group connections they may have.</p>



<h3 class="wp-block-heading" id="h-china">China</h3>



<p>With its vast geography and thousands of years of continuous civilization, China’s population tells a story of ancient migrations, dynastic expansions, and cultural blending. Beyond its borders, waves of Chinese emigration over the past few centuries—spurred by trade, labor opportunities, and political upheaval—have spread the Chinese diaspora across Southeast Asia, North America, and beyond. These new Genetic Groups may give you the opportunity to trace your lineage back to specific regions and uncover the stories of movement, adaptation, and resilience.</p>



<h3 class="wp-block-heading" id="h-korea">Korea</h3>



<p>Shaped by rugged mountains, fertile river valleys, and a deep sense of cultural continuity, Korea tells a story of resilient kingdoms and a people who have preserved their culture through centuries of challenge and change. From the ancient kingdom of Gojoseon to the powerful Three Kingdoms era and the long reign of the Joseon dynasty, Korean history is marked by innovation, Confucian scholarship, and a strong cultural backbone. Despite invasions, colonization, and the lasting division of the peninsula, Korea has maintained a distinct language, script, and cultural legacy.&nbsp;</p>



<h3 class="wp-block-heading" id="h-mongolia">Mongolia</h3>



<p>Known as the birthplace of the Mongol Empire, Mongolia has a deep nomadic heritage that stretches across the steppes of Central Asia. Mongolia rose to global prominence under the leadership of Genghis Khan in the 13th century, uniting nomadic tribes and forging connections from Europe to Asia. Despite centuries of foreign influence, Mongolia has preserved its language, identity, and nomadic heritage. Today, its past lives on not just in epic histories, but in the enduring customs and landscapes of the steppe.</p>



<h2 class="wp-block-heading" id="h-ancestry-composition-update">Ancestry Composition Update</h2>



<p>The 23andMe Ancestry Composition report is a living analysis that improves as we add new reference data. Underlying our Ancestry reports are powerful algorithms and analytical tools developed by 23andMe population geneticists and engineers to offer our customers more insights into their ancestral origins.</p>



<p>Recently, we’ve updated results for people with connections to <a href="https://blog.23andme.com/articles/new-genetic-groups-in-eastern-europe" target="_blank" rel="noreferrer noopener">Eastern Europe</a>, <a href="https://blog.23andme.com/articles/european-diaspora-genetic-groups-update" target="_blank" rel="noreferrer noopener">European diasporas in North America and South Africa</a>, <a href="https://blog.23andme.com/articles/genetic-groups-french-german-us-canada" target="_blank" rel="noreferrer noopener">French and German Groups in North America</a>, and <a href="https://blog.23andme.com/articles/genetic-groups-south-asia" target="_blank" rel="noreferrer noopener">South Asia</a> for instance.</p>



<h2 class="wp-block-heading" id="h-find-out-more">Find out more</h2>



<p>If you are a 23andMe customer with the <a href="https://customercare.23andme.com/hc/en-us/articles/218392668-Upgrading-to-23andMe-s-Newest-Chip-Version" target="_blank" rel="noreferrer noopener">latest genotyping chip</a>, V5, you can see your results in your Ancestry Composition report.</p>



<p>Curious if you’re connected? Discover 23andMe’s <a href="https://www.23andme.com/compare-dna-tests/" target="_blank" rel="noreferrer noopener">Ancestry Service and more</a>.</p>



<h3 class="wp-block-heading">New Genetic Groups added as part of this update:&nbsp;</h3>



<h4 class="wp-block-heading">China and Taiwan</h4>



<ul class="wp-block-list">
<li>Bohai Sea</li>



<li>Central Guangdong Coast</li>



<li>Changle District</li>



<li>Chaoshan Region</li>



<li>Gan and Xiang River Basins</li>



<li>Greater Taishan Region</li>



<li>Guangdong Coast</li>



<li>Guanghai Bay</li>



<li>Hai and Liao River Basins</li>



<li>Hainan</li>



<li>Hong Kong</li>



<li>Hong Kong–Shenzhen Region</li>



<li>Hongshui River Basin</li>



<li>Jiao River Basin</li>



<li>Lower Dong River Basin</li>



<li>Lower Min River Basin</li>



<li>Luan and Songhua River Basin</li>



<li>Luoyuan Bay</li>



<li>Min River Estuary</li>



<li>North and Northeast China Plains</li>



<li>Northern Fujian Coast</li>



<li>Northern Guangzhou</li>



<li>Northern Jiangmen</li>



<li>Northern Pearl River Delta</li>



<li>Northern Taishan</li>



<li>Northern Taiwan</li>



<li>Ou River Basin</li>



<li>Pearl River Delta</li>



<li>Shandong and Liaodong Peninsulas</li>



<li>Sichuan Basin</li>



<li>Southeastern China Coast</li>



<li>Southern Guangxi</li>



<li>Southern Jiangmen</li>



<li>Southern Tibetan Plateau</li>



<li>Southwestern Taiwan and Penghu Islands</li>



<li>Taichung Basin</li>



<li>Taihang Mountains</li>



<li>Taipei Basin</li>



<li>Taiwan Strait</li>



<li>Tarim Basin</li>



<li>Wenzhou Coastal Plains</li>



<li>Western Pearl River Delta</li>



<li>Wugui Mountain Region</li>



<li>Xishuangbanna</li>



<li>Yangtze River Delta</li>



<li>Yong River Basin</li>



<li>You River Basin</li>



<li>Zhongshan–Zhuhai Coast</li>



<li>Zhuoshui and Dajia River Basins</li>



<li>Zuo River Basin</li>
</ul>



<h4 class="wp-block-heading">Korea</h4>



<ul class="wp-block-list">
<li>Gyeonggi</li>



<li>Honam</li>



<li>Honam Plain</li>



<li>Jeju Island</li>



<li>Lower Yeongsan River Basin</li>



<li>Mudeungsan</li>



<li>Naejangsan and Haenam Peninsula</li>



<li>Nakdong River Basin</li>



<li>Nam River Basin</li>



<li>North-Central Korean Peninsula</li>



<li>Northern Sobaek Mountains</li>



<li>Southern Sobaek Mountains</li>



<li>Southwestern Korean Coast</li>



<li>Yeongnam</li>
</ul>



<h4 class="wp-block-heading">Mongolia</h4>



<ul class="wp-block-list">
<li>Dzhida River Basin</li>



<li>Eastern Gobi Desert</li>



<li>Eastern Mongolian Steppe</li>



<li>Gobi Altai Mountains</li>



<li>Lake Khövsgöl and Ider River Basin</li>



<li>Lower Selenge River Basin</li>



<li>Mongolian Altai Mountains</li>



<li>Northern Great Lakes Depression</li>



<li>Northern Lake Baikal</li>



<li>Orkhon River Basin</li>



<li>Southern Great Lakes Depression and Suman River Basin</li>



<li>Southwestern Lake Baikal</li>



<li>Transbaikal Region</li>



<li>Tuul River Basin and Southern Khangai Mountains</li>



<li>Western Khangai Mountains</li>



<li>Zavkhan River Basin</li>
</ul>


23andMe Adds New Ancestry Details for China, Korea, and Mongolia


<p>This month, we’re expanding our <a href="https://blog.23andme.com/articles/23andmes-historic-matches" target="_blank" rel="noreferrer noopener">Historical Matches</a><sup>SM</sup> feature to include a 2024 study that reminds us that, throughout human history, <a href="https://blog.23andme.com/articles/how-was-your-sex-determined-it-might-be-a-lot-more-complicated-than-you-think" target="_blank" rel="noreferrer noopener">biological sex</a> has been more complex than a simple XX or XY binary.</p>



<h2 class="wp-block-heading" id="h-variation-in-chromosome-number-in-humans">Variation in chromosome number in humans</h2>



<p>Most humans have a total of 46 (or 23 pairs) of chromosomes, but around 0.3% of people have a different number. This difference, known as aneuploidy, involves having extra or missing copies of one or more chromosomes. The most common forms of aneuploidy involve the sex chromosomes (X and Y). Some of these—including XXY (often associated with Klinefelter syndrome), XYY, and X (commonly linked to Turner syndrome)—are part of what is recognized today as intersex variation.*</p>



<h2 class="wp-block-heading" id="h-early-ancient-dna-studies-failed-to-account-for-sex-chromosome-number-variation">Early ancient DNA studies failed to account for sex chromosome number variation</h2>



<p>In the early days of ancient DNA research, scientists typically assumed that all individuals had either two X chromosomes (XX) or one X and one Y chromosome (XY). These assumptions were built into standard methods for estimating genetic sex, which relied on the expected ratio of DNA sequences from the X and Y chromosomes. Any deviation from these expected patterns was often interpreted as contamination from modern DNA—such as from an archaeologist or lab technician who had handled the remains.</p>



<p>As a result, individuals with one X chromosome (Turner syndrome), three X chromosomes (Triple X syndrome), or an extra Y chromosome (XYY syndrome) could appear genetically indistinguishable from those with more common XX or XY patterns. Others—such as individuals with XXY chromosomes—might have been misclassified as contaminated.</p>



<figure class="wp-block-image size-full"><img loading="lazy" decoding="async" width="869" height="649" src="http://35.88.189.111/wp-content/uploads/2025/06/Human_chromosomesXXY.png" alt="" class="wp-image-33997" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/06/Human_chromosomesXXY.png 869w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/06/Human_chromosomesXXY-300x224.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/06/Human_chromosomesXXY-768x574.png 768w" sizes="auto, (max-width: 869px) 100vw, 869px" /></figure>



<h2 class="wp-block-heading" id="h-updating-the-historical-record">Updating the historical record</h2>



<p>To address this limitation, <a href="https://pubmed.ncbi.nlm.nih.gov/38212558/" target="_blank" rel="noreferrer noopener">a team of researchers in 2024</a> developed a new approach for estimating sex chromosome number in ancient individuals. Their method accounts for a wider range of possible sex chromosome combinations and makes it easier to distinguish genuine variation from contamination.</p>



<p>Using this new approach, the researchers identified five individuals from ancient Britain with sex chromosome aneuploidies. These included:</p>



<ul class="wp-block-list">
<li>Three individuals (from the Iron Age through the post-Medieval period) with XXY chromosomes</li>



<li>One Early Medieval individual with XYY chromosomes</li>



<li>One Iron Age individual with a mosaic form of Turner syndrome, meaning they had only one X chromosome in some cells and two in others</li>
</ul>



<p>The researchers also applied their approach to non-sex chromosomes and identified a newborn from Early Medieval Britain with a trisomy of chromosome 21, consistent with Down syndrome.</p>



<p>Although the study examined only a subset of ancient individuals whose genomes have been sequenced, the discovery of multiple people with chromosomal aneuploidies highlights that this kind of biological variation has long been part of human history. It also underscores the importance of using inclusive analytical methods—rather than assuming that everyone fits neatly into an XX or XY binary.</p>



<h2 class="wp-block-heading" id="h-learn-more">Learn more</h2>



<p>Want to see if you share a genetic connection with any of these newly added individuals**—or to hundreds of other historical individuals? The Historical Matches? feature is available to <a href="https://www.23andme.com/membership/" target="_blank" rel="noreferrer noopener">23andMe+ Premium</a>™ members.</p>



<p><em>*Not everyone with a sex chromosome variation identifies as intersex. The term “intersex” is used here in the broad biological sense, to acknowledge that some sex chromosome aneuploidies fall under this umbrella in contemporary discussions of human diversity.</em></p>



<p>**<em>Receiving a match to a historical individual who has a sex chromosome aneuploidy does not indicate anything about the number of sex chromosomes that you carry.</em></p>


New Historical Matches Highlight the Importance of Thinking Beyond an XX or XY Binary When Studying the Past


<p>In honor of World Redhead Day on May 26th, we are celebrating one of the most famous redheads in history: <strong>Erik the Red</strong>.&nbsp;</p>



<figure class="wp-block-image alignleft size-full is-resized"><img loading="lazy" decoding="async" width="339" height="480" src="http://35.88.189.111/wp-content/uploads/2025/05/Eric_the_Red.png" alt="" class="wp-image-33944" style="width:314px;height:auto" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/Eric_the_Red.png 339w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/Eric_the_Red-212x300.png 212w" sizes="auto, (max-width: 339px) 100vw, 339px" /></figure>



<p>Born in Norway around 950 CE, Erik Thorvaldsson is best known as the Viking explorer who founded the first Norse settlements in Greenland. His distinctive red hair and strong-willed, fiery personality earned him the nickname &#8220;Erik the Red.&#8221;</p>



<p>Shortly after his birth, Erik’s family moved to Iceland after his father, Thorvald Asvaldsson, was banished from Norway for committing manslaughter. In 982 CE, Erik himself was exiled from Iceland for three years for similar reasons, prompting his expedition along Greenland’s coast, where he established several key Norse settlements, including Brattahlid, where he is said to have spent his later years.</p>



<p>Before leaving Iceland, Erik the Red married Thjodhild Jörundsdóttir, with whom he had several children, including the famed explorer Leif Erikson. Once in Greenland, Thjodhild converted to Christianity, a decision said to have caused tension in her marriage to Erik, who, according to the Icelandic sagas and Norse history, never adopted the faith.</p>



<p>Thjodhild is credited with building one of the first Christian churches in the Americas at the family’s farmstead in Brattahlid. In 2020, as part of a <a href="https://pubmed.ncbi.nlm.nih.gov/32939067/" target="_blank" rel="noreferrer noopener">massive study of the Viking world</a>, researchers sequenced the genomes of Viking Age individuals who were buried in a mass grave in the church’s cemetery. While the exact location of Erik the Red&#8217;s grave remains unknown, it is possible that he was among those buried there.</p>



<p>In honor of Erik the Red and World Redhead Day, we have added four new individuals from Brattahlid to our <a href="https://blog.23andme.com/articles/23andmes-historic-matches" target="_blank" rel="noreferrer noopener">Historical Matches</a><sup>SM</sup> feature. If you are a 23andMe+ Premium™ member, you can check it out to learn more about this ancient site and find out if you are distantly related to them or hundreds of other historical individuals.</p>



<figure class="wp-block-image aligncenter size-large"><img loading="lazy" decoding="async" width="1024" height="690" src="http://35.88.189.111/wp-content/uploads/2025/05/Red_Hair_Against_A_Blue_Sky-1024x690.jpg" alt="" class="wp-image-33945" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/Red_Hair_Against_A_Blue_Sky-1024x690.jpg 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/Red_Hair_Against_A_Blue_Sky-300x202.jpg 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/Red_Hair_Against_A_Blue_Sky-768x517.jpg 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/Red_Hair_Against_A_Blue_Sky-880x593.jpg 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/Red_Hair_Against_A_Blue_Sky-1180x795.jpg 1180w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/Red_Hair_Against_A_Blue_Sky.jpg 1280w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p></p>


New Historical Matches Could Connect You to Erik The Red’s Home


<p><em><strong>Note:</strong> We&#8217;ve updated this post to reflect the addition of even more Genetic Groups in Eastern Europe.</em></p>



<p>We’re excited to announce an update to our 23andMe Ancestry Service adding greater detail for people with Eastern European ancestry. We recently introduced new Genetic Groups in Czechia, Estonia, Hungary, Latvia, Lithuania, Poland, Slovakia, and Slovenia. We&#8217;ve now expanded our Genetic Groups in this region to include groups in Belarus, Moldova, Russia, and Ukraine.&nbsp;&nbsp;</p>



<figure class="wp-block-image size-large"><img loading="lazy" decoding="async" width="1024" height="724" src="http://35.88.189.111/wp-content/uploads/2025/05/ee_cluster-1024x724.png" alt="Map of Genetic Groups in Eastern Europe." class="wp-image-33881" srcset="https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/ee_cluster-1024x724.png 1024w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/ee_cluster-300x212.png 300w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/ee_cluster-768x543.png 768w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/ee_cluster-880x622.png 880w, https://blog.pub.us-west-2.prd.23andme.us/wp-content/uploads/2025/05/ee_cluster-1180x834.png 1180w" sizes="auto, (max-width: 1024px) 100vw, 1024px" /></figure>



<p>The update affects around 14 percent of our customers who tested on our <a href="https://customercare.23andme.com/hc/en-us/articles/218392668-Upgrading-to-23andMe-s-Newest-Chip-Version">latest genotyping chip</a>, and <a href="https://www.23andme.com/membership/">23andMe+ Premium™ members</a> will also be able to see any distant Genetic Group connections they may have to these regions.</p>



<p>Central and Eastern Europe is a region rich in cultural and historical diversity. While these new Genetic Groups provide more granularity, not everyone whose ancestors came from this region will receive a match. In particular, those with Ashkenazi Jewish or Romani heritage are less likely to see one of these new Genetic Groups at this time.&nbsp;&nbsp;</p>



<h2 class="wp-block-heading" id="h-ancestry-composition-update">Ancestry Composition Update</h2>



<p>The 23andMe Ancestry Composition report is a living analysis that improves as we add new reference data. Underlying our Ancestry reports are powerful algorithms and analytical tools developed by 23andMe population geneticists and engineers to offer our customers more insights into their ancestral origins.</p>



<p>Recently, we’ve updated results for people with connections to <a href="https://blog.23andme.com/articles/european-diaspora-genetic-groups-update">European diasporas in North America and South Africa</a>, <a href="https://blog.23andme.com/articles/genetic-groups-french-german-us-canada">French and German Groups in North America</a>, and <a href="https://blog.23andme.com/articles/genetic-groups-south-asia">South Asia</a> for instance.</p>



<h2 class="wp-block-heading" id="h-find-out-more">Find out more</h2>



<p>If you are a 23andMe customer with the <a href="https://customercare.23andme.com/hc/en-us/articles/218392668-Upgrading-to-23andMe-s-Newest-Chip-Version">latest genotyping chip</a>, V5, you can see your results in your Ancestry Composition report.</p>



<p>New Genetic Groups added as part of this update:&nbsp;</p>



<ul class="wp-block-list">
<li>8 new Genetic Groups in Belarus</li>



<li>17 new Genetic Groups in Czechia</li>



<li>5 new Genetic Groups in Estonia</li>



<li>6 new Genetic Groups in Hungary and nearby regions</li>



<li>3 new Genetic Groups in Latvia</li>



<li>11 new Genetic Groups in Lithuania</li>



<li>10 new Genetic Groups in Moldova and nearby regions</li>



<li>32 new Genetic Groups in Poland</li>



<li>24 new Genetic Groups in Russia</li>



<li>15 new Genetic Groups in Slovakia</li>



<li>9 new Genetic Groups in Slovenia</li>



<li>6 new Genetic Groups in&nbsp; Ukraine</li>
</ul>



<p>Curious if you’re connected? Discover 23andMe’s <a href="https://www.23andme.com/compare-dna-tests/">Ancestry Service and more</a>.</p>



<p></p>


Ancestry Service

Nature and Nurture: A New Look at the Genetics of Reading Ability

23andMe Research Institute Attending ASHG 2025

New Genetic Insights Into Cannabis Use

Predicting Treatment-Resistant Depression Using the 23andMe Survey Data

Nature and Nurture: A New Look at the Genetics of Reading Ability

23andMe Research Institute Attending ASHG 2025

New Genetic Insights Into Cannabis Use

Predicting Treatment-Resistant Depression Using the 23andMe Survey Data

New Historical Matches Could Connect You to the Mysterious Skeletons of Roopkund Lake

It’s Finally Here: A New Version of Ancestry Composition

New Historical Matches Could Connect You to the Medieval Iberian Site of Las Gobas

A Major Update to Ancestry Composition

Powerful New Tool Opens Lung Cancer Data for Research Breakthroughs

Inside Health Huddle LIVE: Athletes, Experts & Doctors on Longevity, Genetics & Wellness

Learn More About Our Research and Collaborations During Sickle Cell Awareness Month

Can You Upload DNA Data to 23andMe?

Nature and Nurture: A New Look at the Genetics of Reading Ability

23andMe Research Institute Attending ASHG 2025

New Genetic Insights Into Cannabis Use

Predicting Treatment-Resistant Depression Using the 23andMe Survey Data

A Big Step Forward for Patient Safety

Genetics May Explain Why Some Athletes Are More Prone to ACL Tears

Could Your Painful Periods Be Endometriosis? Here’s What You Should Know

The Duffy Antigen Gene: A Clue Behind White Blood Cell Differences

New Historical Matches Could Connect You to the Mysterious Skeletons of Roopkund Lake

It’s Finally Here: A New Version of Ancestry Composition

New Historical Matches Could Connect You to the Medieval Iberian Site of Las Gobas

A Major Update to Ancestry Composition

New Historical Matches Could Connect You to Europe’s Viking Age

New Historical Matches Could Connect You to Early Medieval France

23andMe Adds New Ancestry Details for China, Korea, and Mongolia

New Historical Matches Highlight the Importance of Thinking Beyond an XX or XY Binary When Studying the Past

New Historical Matches Could Connect You to Erik The Red’s Home

New Genetic Groups in Eastern Europe

Stay in the know.