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Nutrigenomics

How your genes influence nutrition and metabolism. Discover how variants in FTO, MTHFR, VDR, LCT, and COMT affect your ideal diet, vitamin needs, and weight management strategies.

57 articles

Nutrigenomics sits at the intersection of genetics and nutrition science, studying how individual genetic variations influence the way your body absorbs, metabolizes, and utilizes nutrients from food. Rather than following one-size-fits-all dietary advice, nutrigenomics allows you to tailor your eating patterns to your unique genetic blueprint — an approach that is rapidly transforming preventive healthcare and weight management.

One of the most studied genes in nutrigenomics is FTO, often called the "obesity gene." The rs9939609 variant in FTO is carried by roughly 40–60% of European-descent populations and is associated with a 20–30% increased risk of obesity. However, research has shown that carriers of the risk allele respond particularly well to high-protein diets and regular physical activity, effectively neutralizing the genetic predisposition. This is the promise of nutrigenomics: genes are not destiny — they are a roadmap for smarter choices.

MTHFR is another gene with profound nutritional implications. The C677T variant (rs1801133) reduces the enzyme's ability to convert folate into its active form, methylfolate, by up to 70% in homozygous carriers. This can lead to elevated homocysteine levels — an independent risk factor for cardiovascular disease and neural tube defects during pregnancy. Knowing your MTHFR status allows you to choose methylated folate supplements instead of standard folic acid, a simple intervention with significant health benefits.

Other key nutrigenomic genes include LCT (lactose tolerance — the variant rs4988235 determines whether you produce lactase into adulthood), VDR (vitamin D receptor efficiency, affecting calcium absorption and bone health), and TCN2 (vitamin B12 transport). Variants in APOA2 influence your sensitivity to saturated fat and its impact on body weight, while HFE variants can cause iron overload (hereditary hemochromatosis), making dietary iron management critical.

By uploading your raw DNA data to Ask My DNA, you can discover your genetic tendencies related to macronutrient metabolism, vitamin requirements, food sensitivities, and metabolic efficiency — giving you the foundation for a truly personalized nutrition plan developed in conversation with your dietitian or physician.

MTHFR Mutation: What to Do If You Have It

Learn what MTHFR C677T and A1298C variants actually mean, when they matter clinically, and what evidence-based steps to take for homocysteine and folate.

1-Mar 2026·12 min read
Choline Genetics: PEMT, MTHFR, and Brain Health

Complete guide to choline genetics. Learn about PEMT, MTHFR genes, genetic choline synthesis, brain health, liver function, pregnancy needs, and personalized choline supplementation.

1-Feb 2026·13 min read

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