How are Fitness | LifestyleCheck and longevity related?

The relationship between Fitness/LifestyleCheck tests and longevity is indirect and only partially supported by evidence. MyBody-X analyzes variants like FOXO3 rs2802292, which has been associated with increased lifespan in observational studies (e.g., in centenarians). However, individual SNP effects are very small – longevity is shaped by many genes, environment, diet, and exercise. These tests may offer clues, such as favorable lipid metabolism (rs662799) or stress resilience (COMT), but they are not validated as longevity predictors. Evidence: human-observational for FOXO3, but overall unclear. Caveat: Do not make drastic lifestyle changes based on a single SNP.