Evidence check: CYP1A2 in the context of skin aging

CYP1A2 is best known for caffeine metabolism, but it also metabolizes environmental toxins and endogenous compounds. Direct evidence linking CYP1A2 variants to skin aging is limited. Mechanistically, CYP1A2 may influence oxidative stress and activation of procarcinogens in UV-exposed skin, potentially affecting photoaging. Some observational studies suggest associations with skin pigmentation or wrinkle severity, but effect sizes are small and replication is inconsistent. Consumer DNA tests often overstate such links. Evidence grade: mechanistic/unclear. Caveat: lifestyle factors (sunscreen, diet, smoking) dominate skin aging; single SNP effects are minor and not actionable for anti-aging interventions.