warum nehme ich nicht ab trotz kaloriendefizit und sport — what are common causes?

Despite a calorie deficit and exercise, several factors can explain weight loss plateaus. Common causes include inaccurate calorie tracking (e.g., underestimating portions, liquid calories, or condiments), metabolic adaptation (the body lowers resting energy expenditure after prolonged restriction), and water retention masking fat loss. Hormonal issues like hypothyroidism, insulin resistance, or elevated cortisol from chronic stress can impair fat loss. Sleep deprivation and certain medications (antidepressants, beta-blockers) also contribute. Genetic variants (e.g., FTO, MC4R) have small effect sizes; consumer DNA tests for weight loss are not clinically validated and should not guide decisions. A plateau lasting 2–4 weeks is normal; consider adjusting macronutrients, increasing non-exercise activity, or consulting a healthcare professional to rule out medical causes.