What to watch with FUT2 and skin aging?

FUT2 (fucosyltransferase 2) determines secretor status and influences gut microbiome composition and vitamin B12 absorption. Some research suggests a link between the gut microbiome and skin health (gut-skin axis), so FUT2 variants might indirectly affect skin aging through inflammation or barrier function. However, direct evidence for skin aging is weak: no large GWAS or intervention trials have robustly associated FUT2 with wrinkles or loss of elasticity. Most data come from observational studies on atopic dermatitis or microbiome profiles. Effects are polygenic and heavily modified by diet, sun exposure, and hormones. Therefore, a FUT2 result from a consumer DNA test should not be overinterpreted as a 'skin aging gene'. A practical takeaway is that non-secretors may have lower B12 levels, and B12 deficiency can impact skin health. If you know your FUT2 status, ensure adequate B12 intake and maintain standard skin care. The evidence remains mechanistic and preliminary.