How are Fitness Vitality DNA and longevity related?

The relationship between Fitness Vitality DNA tests and longevity is indirect and not well-established scientifically. These tests typically analyze genes related to metabolism, exercise response, or nutrient utilization—not directly lifespan. A known longevity marker is the FOXO3 SNP rs2764264, found in centenarian studies. However, most commercial fitness DNA tests do not routinely include this variant. Moreover, the effect of single genes on life expectancy is small; environment, diet, and exercise have far greater impact. The evidence for a direct link between fitness DNA and longevity is therefore 'mixed': there are mechanistic hints but no strong clinical confirmation. Consumers should understand that DNA tests cannot predict individual lifespan.