What to watch with LCT and Langlebigkeit?

The link between LCT (lactase persistence) and longevity is weak in the scientific literature. LCT variants determine adult lactose digestion ability, but they have no direct causal effect on lifespan. Some observational studies suggest moderate dairy consumption may be associated with slightly lower cardiovascular risk, but evidence is mixed and confounded by diet, genetics, and lifestyle. The provided context contains no specific information on LCT and longevity. Consumer DNA tests often market LCT as a 'wellness' trait, but effect sizes are minimal. Be cautious: lactose intolerance does not preclude a long life, and dairy is neither inherently healthy nor unhealthy. Overall diet quality matters far more.