Where your DNA places you among other people, and the studies behind it.
Not tailored to your result, and not medical advice
Optimize Diet Composition: Replace refined carbohydrates with whole grains, legumes, and high-fiber foods. Fiber slows glucose absorption and blunts post-meal spikes. In a systematic review of randomized trials, higher fiber and whole-grain intake was associated with lower fasting glucose and HbA1c. Pairing carbohydrates with protein and healthy fats can further moderate the glycemic impact of a meal. PLOS Medicine
Exercise Regularly: Both aerobic exercise and resistance training improve insulin sensitivity and help lower glucose. The improvement in insulin sensitivity after a single session can persist for roughly 24-48 hours, so frequency matters. The American Diabetes Association recommends at least 150 minutes per week of moderate-to-vigorous activity for blood glucose management. Diabetes Care (ADA Position Statement)
Maintain Healthy Body Composition: Excess adiposity - particularly visceral (abdominal) fat - is closely linked to insulin resistance. In the Diabetes Prevention Program, an intensive lifestyle program targeting about 7% weight loss plus 150 minutes of weekly activity reduced progression to type 2 diabetes by 58% in people with prediabetes, compared with placebo. New England Journal of Medicine
Protect Sleep and Circadian Rhythm: Experimental sleep-restriction studies show that short sleep (around 5 hours/night) and circadian disruption reduce insulin sensitivity in healthy adults. The MTNR1B link between melatonin signaling and insulin secretion underscores why circadian alignment matters. Aim for consistent sleep-wake schedules and avoid heavy late-night eating to support glucose regulation. Diabetes (ADA journal)
Know Where Your Glucose Sits: Fasting glucose and HbA1c are ordinary blood tests that pick up metabolic changes years before symptoms appear, which is exactly the window where lifestyle change works best. They are commonly included in general health checks, so it is worth knowing your own numbers rather than assuming. Centers for Disease Control and Prevention
How much of this is genetic?
Genetics explains 40% of why people differ in this trait. The rest is environment, daily habits and chance.
Heritability estimate: Simonis-Bik et al. 2008, Twin Res Hum Genet
Background and further reading
Fasting glucose is the concentration of glucose in the blood measured after at least 8 hours without eating. It reflects how well the body balances insulin secretion against the glucose released by the liver. Because it is a continuous biomarker rather than a yes-or-no result, fasting glucose can drift upward for years before crossing into the diabetes range, which is why it is often an early signal of insulin resistance [1].
Genetic Basis: Twin and family studies place the heritability of fasting glucose at roughly 35-50%, with estimates varying by population, age, and measurement setting. Fasting glucose is highly polygenic: a large trans-ancestry meta-analysis from the MAGIC consortium, drawing on up to 281,416 people without diabetes, identified 242 loci across glycemic traits (99 of them new) [2]. Among the best-established fasting glucose signals are GCK (glucokinase, the glucose sensor that sets the threshold for insulin release in pancreatic beta cells), G6PC2 (a beta-cell enzyme that fine-tunes the glucose set point for insulin secretion), GCKR (a regulator of glucokinase activity in the liver), and MTNR1B (melatonin receptor 1B, which links circadian melatonin signaling to insulin secretion) [2][3]. Notably, many variants that nudge baseline fasting glucose are partly distinct from those driving progression to type 2 diabetes [2].
Environmental Factors: Lifestyle and body composition account for much of the day-to-day variation in fasting glucose. Diet (especially fiber intake and the overall glycemic load), physical activity, body weight, and sleep are all associated with glucose levels. Higher fiber and whole-grain intake is linked to lower fasting glucose in controlled trials [5], while short or disrupted sleep reduces insulin sensitivity in experimental studies [3]. Excess visceral fat is one of the strongest correlates of insulin resistance, and the MTNR1B finding helps explain why circadian disruption from shift work or late-night eating tends to worsen glucose handling [3]. The Diabetes Prevention Program showed that an intensive lifestyle program - modest weight loss plus about 150 minutes of activity per week - cut progression to type 2 diabetes by 58% in people at high risk [4].
The published research behind your score, and the variants it draws on.
3 published scores from 2 studies
The fasting glucose score combines 3 polygenic scores drawn from 2 published studies.
Chen J (2021). The trans-ancestral genomic architecture of glycemic traits. Nat Genet: 1.0M
Centers for Disease Control and Prevention Diabetes Testing. CDC (2024)
Chen J, et al. The trans-ancestral genomic architecture of glycemic traits. Nature Genetics (2021)
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.
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