What to watch with MY FOODBOOK and Haut?

When combining MY FOODBOOK (DNA-based nutrition) and Haut (skin DNA test), caution is warranted. Evidence for skin DNA tests on glycation, collagen, or elasticity is weak – mostly marketing or mechanistic hypotheses without robust clinical trials (PMID:26888713). MY FOODBOOK offers some guidance on nutrient needs, but effect sizes are often small (e.g., FTO variants ~0.44 kg weight difference). Both tests should be seen as complementary lifestyle tools, not medical diagnostics. Watch for exaggerated claims (e.g., 'reverse glycation'). Focus on proven measures: adequate protein, vitamin C, sun protection, blood sugar control, and exercise. For skin or metabolic concerns, medical evaluation is preferable. The combo may motivate, but the scientific basis is thin.