Myths vs facts: LCT and skin aging

Claims linking the LCT gene (lactase persistence) directly to skin aging lack scientific evidence. LCT regulates lactose digestion and has no known role in collagen degradation, oxidative stress, or other skin-aging pathways. Myths often arise from indirect associations: individuals with lactose intolerance may avoid dairy, potentially reducing intake of vitamin D and calcium – nutrients relevant for skin health. However, no direct genetic effect exists. The evidence base is clear: no robust human studies, GWAS, or mechanistic data connect LCT variants to skin aging. Consumer DNA tests suggesting such links are misleading. Facts: skin aging is primarily driven by UV exposure, lifestyle (smoking, diet), and genes like MC1R (collagen) or MMPs. LCT is irrelevant. Safety note: lactose intolerance is real but not an anti-aging marker. Don't be fooled by marketing claims.