warum nehme ich nicht ab trotz kaloriendefizit und sport — what symptoms are typical?

Not losing weight despite a calorie deficit and exercise can have several underlying causes. Typical symptoms or associated factors include persistent hunger or increased appetite (e.g., linked to GHRL Leu72Met variant, which modestly raises calorie intake), fatigue, metabolic adaptation (slowed metabolism), water retention, or hormonal imbalances (thyroid, cortisol). Genetic variants like FTO have a small effect (1–2 kg) and are strongly moderated by lifestyle. Evidence for gene-based diet personalization is mixed; consumer tests often overstate the impact. The gut microbiome (e.g., Bifidobacteria) may also influence energy extraction, but evidence is unclear. Importantly, true calorie deficit is often miscalculated – intake is underestimated or expenditure overestimated. Symptoms alone are not diagnostic; medical evaluation (thyroid, insulin resistance) is recommended.