warum nehme ich immer mehr zu — can a microbiome test help?

The question of why you keep gaining weight despite seemingly normal eating is complex. Causes can include a persistent calorie surplus, hormonal changes (e.g., thyroid, insulin resistance), medications, poor sleep, stress, or genetic predisposition. A microbiome test can provide clues about gut bacteria composition—such as low diversity or imbalances in strains linked to metabolism and energy harvest. However, the evidence is weak: no clinically validated microbiome markers exist that can definitively explain weight gain or guarantee personalized weight loss. Most consumer tests rely on mechanistic or marketing associations, not robust human RCTs. A microbiome test may serve as a complementary tool, but it does not replace medical workup (e.g., blood glucose, thyroid) or fundamental lifestyle changes. Without accompanying diet and activity analysis, its utility remains speculative. Caveat: No test alone causes weight loss—calorie balance and exercise remain paramount.