What to watch with BDNF and skin aging?

BDNF (Brain-Derived Neurotrophic Factor) is best known for its role in neuroplasticity, but it is also expressed in skin cells including keratinocytes, fibroblasts, and melanocytes. Preclinical studies suggest BDNF may influence wound healing, melanogenesis, and keratinocyte proliferation – processes relevant to skin aging. However, direct human evidence linking BDNF to skin aging is limited. Most data come from cell or animal models. Lifestyle factors that raise BDNF (e.g., aerobic exercise, omega-3s, polyphenols) might indirectly benefit skin, but this remains speculative. No validated BDNF biomarkers for skin aging exist in practice. Genetic testing for BDNF variants (e.g., rs6265) is not clinically established for skin aging. Be cautious of marketing claims that overstate BDNF as an anti-aging target. Evidence grade: mechanistic, not human-confirmed.