Article / Updated 03-26-2016
Dietary sources of glutamic acid — a nonessential amino acid — are animal and vegetable proteins. This nutrient is found in high concentrations in the human brain.
Proline derives from glutamic acid. Proline is one of the main amino acids your body uses to build collagen, which makes up the tough, elastic fibers of scar tissue and is the main structural material of your body — bones, tendons, ligaments, and skin all contain collagen.