How are ADH1B and longevity related?

The provided contexts do not contain information on ADH1B and longevity. In general scientific knowledge, variants in the ADH1B gene (e.g., rs1229984) affect alcohol metabolism: carriers of the slow-metabolizing variant accumulate more acetaldehyde, causing discomfort after drinking and typically reducing alcohol intake. This lowers the risk of alcohol-related diseases (liver cirrhosis, certain cancers), which may indirectly increase life expectancy. Epidemiological studies show an association with lower mortality, especially in Asian populations. However, the effect is population-dependent and not directly causal for longevity. Since the provided contexts lack this information, the evidence is considered unclear.