Longevity DNA Test: what can you do yourself?

A longevity DNA test (e.g., from MyBody-X) often promises personalized anti-aging advice, but the scientific basis is generally weak. Most tested genes (e.g., FTO, VDR, APOA5) have only tiny effects on weight, vitamin D levels, or triglycerides – lifestyle dominates. What you can do yourself: eat a balanced diet, exercise regularly, get enough sleep, and manage stress. These factors have strong evidence for influencing lifespan. A DNA test does not replace medical advice. Before supplementing (e.g., vitamin D), measure your blood level. Caveat: many claims are exaggerated marketing. The evidence for personalized lifespan extension via such tests is weak to absent.