Evidence check: VKORC1 in the context of skin aging

VKORC1 encodes vitamin K epoxide reductase, a key enzyme in the vitamin K cycle. This cycle activates matrix Gla protein (MGP), which inhibits calcification in blood vessels and may influence skin elasticity and aging. Some studies have linked VKORC1 variants to skin properties via MGP, but the evidence is mostly mechanistic or derived from GWAS on vascular calcification, not directly on skin aging. No robust clinical trials confirm that VKORC1 polymorphisms predict skin aging in individuals. The effect size is likely small and modulated by vitamin K intake. Direct-to-consumer genetic testing for VKORC1 in the context of skin aging is not clinically validated. Safety note: VKORC1 testing is primarily used for warfarin dosing; interpreting it for skin aging requires caution and should not replace dermatological advice.