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" We can influence dopamine production through our diets. You can’t actually eat dopamine, but you can eat the thing that makes it—tyrosine. It is a nonessential amino acid, meaning that you must consume it in your diet because your body doesn’t make its own. However, before you start rushing out to the supermarket to get a cart full of tyrosine—cheese, soybeans, beef, lamb, pork, fish, chicken, nuts, seeds, eggs, dairy, beans, and whole grains—research shows that it really only helps if you’re deficient to begin with. "
― , The Brave Athlete: Calm the F*ck Down and Rise to the Occasion