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

Gaining weight despite a calorie deficit is a common frustration. Possible reasons include water retention, hormonal fluctuations (cortisol, thyroid), inaccurate calorie tracking, metabolic adaptation (basal metabolic rate drops during dieting), or changes in gut microbiota. A microbiome test can show the composition of your gut bacteria, but the evidence that it explains or fixes weight gain under a deficit is weak. Most commercial tests rely on association studies with small effect sizes, not causal proof. Results are heavily influenced by diet, medications, and lifestyle. A microbiome test may provide complementary insights but should not replace medical evaluation. Be cautious of exaggerated marketing claims. A more reliable approach is to double-check calorie intake, look for hidden calories, and rule out medical causes with a doctor.