What does a BDNF genotype mean for lifestyle?

BDNF (Brain-Derived Neurotrophic Factor) is a key protein for neuroplasticity—the brain's ability to adapt and form new connections. The most studied genetic variant is rs6265 (Val66Met), which affects activity-dependent BDNF secretion. Carriers of the Met variant have lower BDNF release, linked to a slightly increased risk of depression, anxiety, and reduced cognitive reserve in aging. For lifestyle, this means: exercise, especially aerobic endurance training, can boost BDNF production—Met carriers may benefit even more because they start from a lower baseline. Cognitive stimulation, social engagement, and an anti-inflammatory diet (omega-3s, polyphenols) may also help. However, effect sizes are small. A BDNF genotype is not destiny but a clue to prioritize certain lifestyle interventions. Evidence comes from association studies and animal models, not from randomized controlled trials directly testing lifestyle recommendations. Overblown marketing claims (e.g., 'the intelligence gene') are unscientific. Measuring actual BDNF blood levels is more informative than genotype alone.