warum nehme ich trotz kaloriendefizit zu — what can you do yourself?

The question of why you gain weight despite a calorie deficit is complex and not directly addressed in the provided context. Possible causes include metabolic adaptation (basal metabolic rate drops during prolonged deficits), water retention (due to salt, carbs, or hormonal fluctuations), inaccurate calorie tracking (portion sizes, hidden calories in drinks/sauces), and medical issues like hypothyroidism, insulin resistance, or medications. Poor sleep and chronic stress can also promote weight gain via cortisol. Consumer DNA tests (e.g., FADS, PPARA) are often marketed as explaining metabolic responses, but effect sizes are small and insufficient to explain weight gain in a deficit. What you can do yourself: track calories more precisely (weigh food), ensure adequate protein and fiber, incorporate strength training to preserve muscle mass, manage stress, and improve sleep hygiene. If weight gain persists, consult a doctor to check thyroid and cortisol levels. The evidence is mixed – many factors are mechanistically plausible but lack strong clinical trials.