Where your DNA places you among other people, and the studies behind it.
Not tailored to your result, and not medical advice
Maintain a Healthy Body Weight: Excess body weight is the leading modifiable risk factor for T2D. In the Diabetes Prevention Program, adults with prediabetes who reached at least 7% weight loss plus regular activity cut their diabetes incidence by 58%, and follow-up shows the benefit lasts for years. Weight management is among the highest-impact steps, including for people with elevated genetic risk. Diabetes Prevention Program (PMC)
Exercise Regularly: The American Diabetes Association recommends at least 150 minutes per week of moderate-to-vigorous activity spread across at least three days, plus 2-3 weekly resistance sessions. Regular activity improves insulin sensitivity and helps reduce visceral fat. In the DPP, meeting the activity goal was associated with lower diabetes risk even independent of weight loss. Diabetes Care (ADA position statement, PMC)
Optimize Diet Quality: Favor whole grains, legumes, vegetables, fruits, and lean proteins over ultra-processed foods. Higher dietary fiber slows glucose absorption and supports glycemic control. Greater adherence to a Mediterranean-style diet is associated with roughly a 20-30% lower risk of T2D in pooled studies and trials. Limiting sugar-sweetened beverages is one of the more consistently beneficial dietary changes. British Journal of Nutrition (systematic review, PMC)
Protect Sleep Quality: Short sleep and poor sleep quality are each associated with a higher risk of T2D in large meta-analyses, and laboratory studies show that sleep restriction lowers insulin sensitivity and glucose tolerance. Shift work and circadian disruption are also linked to elevated risk. Aiming for consistent, good-quality sleep of around 7-8 hours supports metabolic health. Frontiers in Endocrinology (meta-analysis, PMC)
Catch Prediabetes While It Is Reversible: Fasting glucose and HbA1c detect prediabetes years before symptoms appear, which is the window where lifestyle change is most effective. These are ordinary blood tests commonly included in general health checks, and elevated genetic risk is a good reason to know your own numbers. Centers for Disease Control and Prevention
How much of this is genetic?
Genetics explains 55% of why people differ in this trait. The rest is environment, daily habits and chance.
Heritability estimate: Willemsen et al. 2015, Twin Res Hum Genet
Background and further reading
Type 2 diabetes (T2D) is the most common form of diabetes, making up roughly 90-95% of cases and affecting hundreds of millions of people worldwide [1]. In the United States, about 38 million adults have diabetes, the large majority of it type 2 [1]. It develops when the body becomes resistant to insulin's glucose-lowering effects and the pancreas cannot compensate with enough insulin. Over time the resulting high blood sugar raises the risk of cardiovascular disease, kidney failure, vision loss, nerve damage, and lower-limb amputation [1]. Much of that risk is modifiable: in people at high risk, structured lifestyle change can prevent or delay the disease [2].
Genetic Basis: Twin studies estimate the heritability of T2D in the range of about 40-70%, with large twin registers pointing toward the upper end [5]. The condition is highly polygenic. A multi-ancestry meta-analysis of 1.4 million participants in the Million Veteran Program identified 558 T2D-associated variants, including 318 newly reported loci [3], and a later study of more than 2.5 million people mapped 1,289 independent signals to 611 loci [4]. Implicated genes affect beta cell function (TCF7L2, SLC30A8, KCNJ11), insulin signaling (IRS1, PPARG), and adiposity. Variants in TCF7L2 are the strongest common-variant signal, with the risk allele carrying an odds ratio near 1.4 and influencing insulin secretion and incretin response [3]. High heritability does not make T2D inevitable: the recent global rise is driven largely by changes in diet, weight, and activity, which interact with this inherited susceptibility.
Modifiable Risk Factors: Excess body weight, particularly around the abdomen, is the strongest modifiable risk factor for T2D. The Diabetes Prevention Program (DPP) randomized more than 3,000 adults with prediabetes and found that a lifestyle program targeting at least 7% weight loss and 150 minutes of weekly activity lowered diabetes incidence by 58% over about three years, compared with a 31% reduction from metformin [2]. Physical inactivity, diets high in ultra-processed food and sugar-sweetened drinks, short or poor-quality sleep, and smoking are also associated with higher risk [6]. Lifestyle and genetics interact, and people at higher inherited risk still benefit substantially from these changes.
The published research behind your score, and the variants it draws on.
101 published scores from 31 studies
The type 2 diabetes score combines 101 polygenic scores drawn from 31 published studies.
Centers for Disease Control and Prevention. Type 2 Diabetes. CDC Diabetes (2024)
Suzuki K, et al. Genetic drivers of heterogeneity in type 2 diabetes pathophysiology. Nature (2024)
These traits are influenced by some of the same genes and variants as this one
HbA1c: Glycated hemoglobin, reflecting average blood sugar levels over the past 2-3 months.
Body Mass Index: A measure of body weight relative to height, used as a proxy for overall adiposity.
Content updated August 2026.
ReadYourDNA provides educational interpretation of DNA data you already have. It is not diagnostic, not a substitute for professional medical advice, diagnosis, or treatment, and is not intended to diagnose, treat, cure, or prevent any disease. Talk to a clinician before acting on any result.
Raw DNA Data Reports for 23andMe & AncestryDNA · About ReadYourDNA · FAQ · Methodology & Science · Pricing · Support and complaints · Legal & Contact · Health Traits · Pharmacogenomics · Carrier Status · Variant Explorer · The Human Karyotype · Privacy Policy · Terms of Service · Accessibility · Consumer Health Data Privacy · Your Privacy Choices · Editorial Standards · Your Data, Checkable · Sample Report · ReadYourDNA and Promethease compared · What is inside a 23andMe raw data file · What is inside an AncestryDNA raw data file · What a chatbot can and cannot do with your raw DNA file · Where a raw DNA file can still be uploaded in 2026
Written, maintained and operated by Martin Pechhacker, sole proprietor, Vienna, Austria. Trade register GISA 40064420. support@readyourdna.com