Evidence check: VDR in the context of skin aging

The vitamin D receptor (VDR) is linked to skin aging through its role in cell proliferation, collagen synthesis, and inflammation. Several studies report associations between VDR polymorphisms (e.g., FokI, BsmI, TaqI) and wrinkle formation, loss of elasticity, or pigmentation. However, the evidence is mostly observational and mechanistic; robust clinical trials demonstrating a causal effect of VDR variants on skin aging are lacking. Effect sizes are small and confounded by lifestyle factors like UV exposure and diet. Therefore, a DNA test for VDR cannot reliably predict skin aging. A more evidence-based approach includes sun protection, antioxidants, and adequate vitamin D status. The clinical utility of VDR genotyping for anti-aging remains unproven.