MY FOODBOOK: which diet helps?

My Foodbook from MyBody-X provides personalized dietary suggestions based on genetic variants (e.g., FTO, APOA5, FUT2). The concept is promising, but the scientific evidence for gene-based diets is weak. Studies show that single SNPs like FTO have only a small effect on BMI (~0.3 kg/m² per risk allele) and do not robustly support specific diet prescriptions like 'low-fat'. Calorie balance, nutrient density, and long-term adherence matter far more. My Foodbook can serve as a rough guide but should not replace medical advice or lab tests. The recommendations are often derived from mechanistic or observational data (GWAS, mechanistic studies) without clinical validation. A balanced diet (e.g., Mediterranean) is better supported for general health. Caveat: No single diet is universally best; individual tolerance and lifestyle are key.