L-Proline is an amino acid that is necessary for collagen production.* Collagen is the main structural protein that constitutes all human connective tissues, including skin, tendons, ligaments, joints, bone, and blood vessels (veins and arteries).* L-Proline is therefore a building block that helps to stabilize and strengthen the structural components of the body.* Although Proline is naturally produced in the body, in specific high-demand situations, a regular diet may not be sufficient to respond to the body’s need for Proline.*