Proline is synthesized by the body from the amino acids glutamine or ornithine. The best food sources for Proline are dairy products and eggs, and in lesser amounts meats and wheat germ. It is one of the main components of collagen, the connective tissue structure that binds and supports all other tissues. It is most effective in this regard when combined with vitamin C supplementation.
Proline improves skin texture and studies have shown that collagen is neither properly formed or maintained if Vitamin C is lacking, so proline is most effective when adequate Vitamin C is supplied at the same time.