Can BDNF help with Sport?

BDNF (Brain-Derived Neurotrophic Factor) is a protein that supports neuronal survival and plasticity. Exercise, especially aerobic and high-intensity training, reliably increases BDNF levels in blood and brain. This rise is linked to improved cognition, mood, and motor learning, which can indirectly benefit sports performance. However, direct BDNF supplementation is not evidence-based: oral BDNF is not bioavailable and cannot cross the blood-brain barrier effectively. The evidence is mechanistic and human-observational: exercise elevates BDNF, but whether this alone enhances athletic performance remains unclear. Consumer tests measuring BDNF lack clinical validation. Practical advice: focus on regular exercise to naturally boost BDNF, not on supplements or tests. Caveat: No proven BDNF supplement for sport; claims are marketing.