Evidence check: CYP2D6 in the context of Haut

CYP2D6 is a cytochrome P450 enzyme primarily involved in drug metabolism. In the context of skin, there is no established, evidence-based link. Some commercial genetic tests claim that CYP2D6 variants may affect skin tolerance to medications or cosmetics, but the scientific basis is weak. Existing studies are mostly mechanistic or case-based. Neither dermatology nor nutrigenetics supports routine CYP2D6 testing for skin issues. Anyone with skin concerns should consult a dermatologist rather than rely on genetic testing. The evidence is therefore best described as unclear or marketing-driven.