was regt stoffwechsel an — what are common causes?

What stimulates metabolism? Common causes include physical activity (especially resistance training increases resting metabolic rate via muscle mass), adequate protein intake (diet-induced thermogenesis), quality sleep, and proper thyroid function. Some compounds like caffeine and capsaicin have minor, transient effects. Consumer DNA tests often claim to identify a 'slow metabolism' gene, but evidence for single-gene effects (e.g., PPARGC1A, FTO) is weak; lifestyle factors dominate. The provided context does not contain direct evidence on metabolism boosters. Therefore, the most evidence-based answer is that sustainable metabolic rate is primarily determined by lean body mass, age, and physical activity, not by over-the-counter tests or supplements. Caveat: If you suspect a medical condition (e.g., hypothyroidism), consult a doctor rather than relying on home tests.