warum nehme ich immer mehr zu — can a DNA test help?

The question 'why am I gaining more weight' is multifactorial. A DNA test can identify certain genetic variants (e.g., in FTO, TCF7L2, ADRB2) that modestly influence metabolism, fat storage, or appetite regulation. However, the evidence for most weight-loss-related SNPs is weak to moderate; genetics typically accounts for a small fraction of weight gain. Lifestyle factors – diet, physical activity, sleep, stress – are far more decisive. Commercial 'weight loss DNA tests' often claim to provide personalized nutrition plans, but the scientific support is limited. They may serve as motivational tools but cannot diagnose or guarantee weight loss. A DNA test alone will not reverse weight gain without behavioral changes. Medical causes (e.g., hypothyroidism, insulin resistance) should be ruled out first. Overall, the evidence is predominantly marketing-driven.