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

The question of why you aren't losing weight despite a calorie deficit is complex. Possible reasons include metabolic adaptation (your metabolism slows with prolonged restriction), inaccurate tracking of intake or expenditure, water retention, hormonal issues (thyroid, cortisol), or insufficient protein. Can a microbiome test help? Only to a limited extent. While gut bacteria influence energy harvest and insulin sensitivity, the evidence for personalized dietary advice from stool tests is weak. Most commercial tests rely on correlations, not causal clinical trials. Even if certain bacteria (e.g., Firmicutes/Bacteroidetes ratio) appear imbalanced, standardized cut-offs and proven interventions are lacking. A sound approach is to first verify your calorie deficit with a food diary and scale, optimize sleep and stress, and rule out medical causes (insulin resistance, PCOS, hypothyroidism). A microbiome test may provide additional context but is not a standalone solution. Current evidence is best rated as 'unclear' to 'mixed'.