What can the MY FOODBOOK tell you — and what not?

The MY FOODBOOK is a personalized nutrition and lifestyle concept based on genetic analyses (e.g., COMT, MTNR1B). It can provide hints about how your body may respond to certain nutrients, caffeine, or stress – for instance via the COMT Val158Met polymorphism affecting dopamine and catecholamine metabolism. However, the effect sizes of these variants are generally small and overshadowed by environment, epigenetics, and lifestyle. The MY FOODBOOK cannot make medical diagnoses, predict diseases, or replace professional medical advice. It does not provide direct lab measurements like blood levels but interprets probabilities from population-based association studies (GWAS). The evidence for many dietary recommendations is moderate to weak; clinical endpoint trials for longevity are lacking. Users should view results as suggestions for a healthier lifestyle, not as deterministic prescriptions. Caution is warranted regarding exaggerated claims of 'optimization' or 'anti-aging' – these often reflect marketing more than science.