What to watch with BDNF and longevity?

BDNF (Brain-Derived Neurotrophic Factor) is a protein crucial for neuronal survival and plasticity, often linked to cognitive health and indirectly to longevity. However, the evidence for a direct causal role of BDNF gene variants in human lifespan is weak – mostly GWAS-level associations with small effect sizes, heavily confounded by lifestyle factors (exercise, diet, stress). The provided context does not include BDNF data; it covers SIRT1, APOE, MTHFR, and others. Be cautious: direct-to-consumer tests marketing BDNF as a 'longevity marker' often overstate clinical utility. More robust longevity predictors include blood pressure, lipid profiles, and inflammatory markers. Physical activity and cognitive engagement are proven to upregulate BDNF expression – this is more actionable than any single SNP. For MyBody-X users, check if BDNF is actually in your panel; if not, focus on validated markers.