Can ADH1B help with longevity?

Whether ADH1B can promote longevity is not scientifically clear. ADH1B encodes alcohol dehydrogenase, which metabolizes ethanol to acetaldehyde. Certain variants (e.g., ADH1B*2, rs1229984) accelerate this step, leading to higher acetaldehyde levels. Acetaldehyde is a cellular toxin and carcinogen – faster alcohol clearance reduces alcoholism risk but may increase cancer risk (e.g., esophageal cancer). No direct longevity benefit has been demonstrated. Epidemiological studies show conflicting associations between moderate alcohol intake and all-cause mortality; genetic studies on ADH1B do not consistently link it to extended lifespan. The evidence is purely mechanistic: the biological pathway is known, but causal longevity benefit is absent. Consumer DNA tests provide only a tendency, not a medical prognosis. Heavy drinkers with a fast ADH1B variant may even face increased health risks. In summary, ADH1B alone is not a longevity gene; its influence is indirect and context-dependent.