Is FTO useful for Langlebigkeit?

The question of whether the FTO gene is useful for longevity requires a nuanced view. FTO (Fat Mass and Obesity Associated) is best known from genome-wide association studies (GWAS) linking it to increased BMI and obesity risk. Some studies have explored associations with metabolic health and, indirectly, lifespan, but the evidence for a direct causal role in longevity is weak. Most effects are small and heavily modulated by lifestyle factors like diet and exercise. Consumer DNA tests that analyze FTO variants (e.g., rs9939609) can provide a risk profile for weight gain, but not a reliable prediction of individual lifespan. Longevity is determined by a complex interplay of genetics, epigenetics, environment, and lifestyle, with single genes like FTO contributing only marginally. In summary: FTO is not directly useful for longevity; the evidence is limited to GWAS for obesity, not lifespan extension. Be cautious of marketing overclaims.