Can ADH1B help with Langlebigkeit?

Whether ADH1B directly contributes to longevity requires careful interpretation. ADH1B encodes alcohol dehydrogenase, which catalyzes the first step of ethanol metabolism. Certain variants (e.g., rs1229984, ADH1B*2) result in faster conversion of ethanol to acetaldehyde, associated with lower alcohol consumption and reduced risk of alcohol-related diseases such as liver cirrhosis and some cancers. Epidemiological studies show that carriers of these variants tend to drink less, which can positively impact cardiovascular health and overall mortality. However, the effect on longevity is indirect and confounded by lifestyle factors. Direct longevity GWAS have not identified ADH1B as a major locus. Moreover, fast metabolizers may face an increased risk of esophageal cancer if they do drink, due to acetaldehyde accumulation. A consumer DNA test like MyBody-X can detect ADH1B variants, but the predictive value for individual lifespan is limited. The evidence is moderate, based on observational and genetic association studies. In summary, ADH1B may influence healthspan indirectly through alcohol intake behavior, but it is not a direct longevity gene.