Question: how to increase bdnf in the brain?
Answer: Exercise. Endurance exercise releases a protein called FNDC5 (fibronectin type III domain-containing protein 5. ... 
Deep sleep. You release brain-derived neurotrophic factor during the deeper stages of sleep. ... 
Meditation. ... 
Psychedelics. ... 
Polyphenols. ... 
Hypoxia. ... 
Sunlight. ... 
Intermittent fasting.