What role does CYP2C19 play in longevity?

CYP2C19 is a cytochrome P450 enzyme primarily involved in drug metabolism, including clopidogrel, proton pump inhibitors, and certain antidepressants. Its direct role in longevity is not supported by strong human evidence. Genetic variants (e.g., *2, *3, *17) alter enzyme activity, affecting drug efficacy and toxicity. This could indirectly influence healthspan—for example, poor clopidogrel activation may increase cardiovascular risk. However, no robust longitudinal studies link CYP2C19 polymorphisms to overall lifespan. The evidence is mechanistic and pharmacogenetic, not from longevity GWAS. Single CYP2C19 SNPs should not be marketed as longevity markers. Clinical relevance lies in personalized dosing, not life extension. Consumers should be cautious of overblown claims from direct-to-consumer genetic tests.