Can BDNF help with longevity?

BDNF (Brain-Derived Neurotrophic Factor) is a protein crucial for neuronal survival and plasticity. It is often linked to cognitive health and stress resilience. Some research suggests higher BDNF levels may correlate with slower cognitive decline and better neuroprotection, which could indirectly support longevity. However, direct evidence that increasing BDNF extends human lifespan is weak. Most findings come from animal studies or observational human data. Lifestyle factors like exercise, certain diets, and some supplements can modestly raise BDNF, but individual responses vary. Consumer DNA tests that report BDNF gene variants (e.g., rs6265) provide mechanistic insights but not actionable longevity guidance. The effect size of single variants is small, and longevity is influenced by many genes and environmental factors. Therefore, while maintaining healthy BDNF levels is beneficial for brain health, claiming it 'helps with longevity' is an oversimplification. Evidence is mechanistic/unclear. Always consult a healthcare professional before making changes based on such tests.