Myths vs facts: ADH1B and Langlebigkeit

The claim that the ADH1B gene directly determines longevity is a myth. In reality, ADH1B (e.g., variant rs1229984) affects alcohol metabolism: carriers of the ADH1B*2 variant metabolize alcohol more slowly, leading to intolerance and lower alcohol intake. Epidemiological studies suggest this reduces the risk of alcohol-related cancers and liver disease, which may indirectly contribute to longer lifespan. However, the effect is small – longevity is multifactorial (diet, exercise, environment, other genes). Consumer DNA tests like MyBody-X often overstate this link. The provided context lacks direct evidence on ADH1B and longevity; this answer relies on general scientific literature. Evidence grade: human-moderate. Caveat: No clinical prediction; lifestyle dominates.