warum nehme ich zu trotz kaloriendefizit — can a DNA test help?

Gaining weight despite a calorie deficit is a common frustration, but a true deficit should lead to weight loss. Possible explanations include measurement errors (underreporting food intake, inaccurate tracking), metabolic adaptation (the body lowers energy expenditure during prolonged restriction), water retention (from sodium, carbs, or hormonal cycles), or underlying medical issues (hypothyroidism, insulin resistance, Cushing's syndrome). Can a DNA test help? Only to a very limited extent. While certain gene variants (e.g., FTO, MC4R, TAS2R38) are associated with obesity risk, appetite, or taste preferences, their individual effect sizes are small and cannot explain weight gain in a verified deficit. The DNA tests offered by MyBody-X (MEDI CHECK, Fitness LifestyleCheck, Longevity Test) are not designed for weight management; they focus on drug intolerances, sports biomarkers, or aging claims with weak evidence. No current consumer DNA test can reliably diagnose why you gain weight in a deficit. The evidence is mixed: some GWAS exist for obesity, but not for this specific scenario. Practical steps include verifying your deficit, consulting a doctor, and considering a registered dietitian. DNA testing for weight gain remains largely marketing-driven and lacks clinical validation for this question.