What to watch with ADH1B and Müdigkeit?

ADH1B encodes alcohol dehydrogenase, which converts ethanol to acetaldehyde. Variants like rs1229984 (ADH1B*2) cause faster conversion, leading to higher acetaldehyde levels. This can trigger facial flushing, nausea, headache, and fatigue after drinking – the 'alcohol flush reaction'. Fatigue here is a symptom of acetaldehyde toxicity, not a direct genetic effect. Slow metabolizers (ADH1B*1) may experience prolonged alcohol effects, also contributing to tiredness. However, fatigue is multifactorial: sleep, stress, nutrition, and other genes (e.g., COMT, MTHFR) play larger roles. A single ADH1B test cannot diagnose fatigue causes. If you feel unusually tired after alcohol, consider reducing or avoiding it. Evidence is mechanistic; no clinical trials link ADH1B directly to fatigue. Persistent fatigue warrants medical evaluation.