Is CYP2D6 useful for skin aging?

CYP2D6 is a phase I drug-metabolizing enzyme, not directly linked to skin aging. The provided context contains no evidence connecting CYP2D6 to skin aging; it only mentions MC1R (melanocortin 1 receptor) as relevant for pigmentation and possibly aging. Claims that CYP2D6 variants influence collagen, glycation, or wrinkle formation are speculative and often based on weak mechanistic or marketing extrapolations. No validated human studies support using CYP2D6 genotype to guide skincare or anti-aging supplements. Lifestyle factors (UV protection, diet, smoking) overwhelmingly determine skin aging. Consumers should not rely on such single-gene predictions. Evidence grade: marketing/unclear.