Myths vs facts: CYP2C19 and skin aging

Claims linking CYP2C19 variants directly to skin aging lack scientific support. CYP2C19 is a drug-metabolizing enzyme primarily involved in processing medications like clopidogrel and proton pump inhibitors. Some direct-to-consumer tests market a connection to oxidative stress or detoxification, but no robust human studies demonstrate a causal or predictive relationship between CYP2C19 polymorphisms and skin aging (wrinkles, elasticity, collagen degradation). Evidence is limited to speculative mechanisms from in vitro or animal models. Skin aging is predominantly driven by UV exposure, lifestyle factors (smoking, diet), hormones, and intrinsic genetic factors such as collagen-related genes. A CYP2C19 test for skin aging prediction is not evidence-based and may create false expectations. Consumers should focus on proven anti-aging strategies: sun protection, healthy diet, adequate sleep, and dermatological advice. The evidence for CYP2C19 and skin aging is rated as 'unclear'.