COLLAGEN NATIVE TYPE 2: Our dietary supplement is developed as a Gut, Joint, and Skin Health Formula. Collagen is the most abundant protein found in the body and the key structural protein found in the skin, joint, bone, blood vessels, and connective tissue. Natural collagen production decreases with age until levels are too low to replace collagen that has been lost. When ingested, collagen is broken down by natural digestive processes and absorbed to repair and replenish collagen in the body.