What role does CYP2C19 play in Haut?

The role of CYP2C19 in the skin is not well established. CYP2C19 is a cytochrome P450 enzyme primarily expressed in the liver, where it metabolizes drugs like clopidogrel and proton pump inhibitors. While CYP2C19 mRNA has been detected in skin cells, its functional relevance remains unclear. Mechanistic studies suggest it might contribute to the metabolism of topical agents or endogenous compounds, but human evidence is lacking. Consumer DNA tests often include CYP2C19 variants for drug response predictions, not for skin health. Therefore, claims about skin benefits from CYP2C19 genotyping are speculative. Evidence: mechanistic/unclear. Caveat: No validated clinical role in dermatology.