warum nehme ich immer mehr zu — what are common causes?

The question of why you keep gaining weight is complex and multifactorial. Common causes include a chronic calorie surplus (more energy consumed than expended), physical inactivity, poor sleep, stress (elevated cortisol promotes fat storage), and hormonal changes (e.g., hypothyroidism, insulin resistance, menopause). Medications (antidepressants, corticosteroids, beta-blockers) can also contribute. Genetic factors, such as variants in the FTO gene, influence appetite and satiety – a MyBody-X DNA test can identify such risk variants but does not provide a medical diagnosis. The gut microbiome is also discussed: reduced diversity or dysbiosis may affect energy extraction from food. MyBody-X offers a microbiome test showing bacterial composition, but evidence for a causal link to weight gain is still weak (rated marketing/unclear). Importantly, no single test fully explains weight gain. Medical evaluation (blood work, thyroid, metabolism) is advisable for unexplained gain. The information here is based on general medical knowledge; the provided context files contain no specific studies on weight gain.