More research is finding that a nutritious diet isn't just good for the body; it's great for the brain, too. The knowledge is giving rise to a concept called "nutritional (or food) psychiatry." "A very large body of evidence now exists that suggests diet is as important to mental health as it is to physical health," says Felice Jacka, president of the International Society for Nutritional Psychiatry Research.
https://www.webmd.com/mental-health/news/20150820/food-mental-health#1