Can LCT help with Langlebigkeit?

Whether the LCT gene (lactase persistence) directly contributes to longevity is not supported by current evidence. LCT determines adult lactose digestion, which influences dairy intake but not lifespan per se. Some observational studies suggest that lactase-persistent individuals in dairy-consuming populations may have better calcium status and bone health, potentially reducing fracture risk in old age. However, these associations are modest and confounded by lifestyle, geography, and overall diet. The provided context contains no direct link between LCT and longevity. Therefore, the evidence is best classified as 'unclear'. Consumers should not interpret LCT as a 'longevity gene'; it is a marker for lactose tolerance with indirect, weak ties to healthy aging through nutrition, not a determinant of lifespan.