In general, foods with a high content of amino acids are those that contain a lot of protein.
Getting specific amino acids into your body via a regular diet is somewhat difficult. This is because amino acids found in foods are bound to one another. Free-form, pure amino acids are therefore only available through sports or nutritional supplements.
However, there are specific foods that have a relatively high concentration of certain amino acids:
Foods rich in L-arginine
Foods with a lot of BCAA
Foods with a high content of tryptophan