What to watch with VDR and skin aging?

The vitamin D receptor (VDR) influences skin aging through regulation of collagen, matrix metalloproteinases, and barrier proteins. Polymorphisms such as FokI, BsmI, TaqI, and ApaI have been linked to altered vitamin D signaling. Studies show moderate associations between VDR variants and photoaging, wrinkling, and loss of elasticity. However, effect sizes are small, and evidence is mostly from observational studies, not clinical trials. Importantly, a genetic test alone cannot predict skin aging. UV protection, vitamin D status (25-OH-D > 30 ng/ml), diet, and lifestyle are far more impactful. VDR findings should be seen as a clue, not a diagnosis. Consumers should avoid overinterpreting DTC reports and focus on evidence-based skin health measures.