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

Gaining weight despite a calorie deficit is a common frustration, but a DNA test cannot explain it. Short-term fluctuations are usually due to water retention, hormonal changes, or inaccurate calorie tracking (e.g., portion sizes, hidden calories). Genetic tests for obesity-related variants like FTO (rs9939609) show a robust statistical association with BMI, but the effect size is tiny (~0.3 kg/m² per allele) and not clinically actionable. The evidence is strong for association but weak for utility in personal weight management. No DNA test can diagnose why you gain weight on a deficit – that requires dietary logging, medical checks (thyroid, metabolism), and possibly body composition analysis. Consumer marketing often overstates the predictive power. In short: a DNA test will not help with this specific question.