Jointace Collagen provides a high-grade collagen which is hydrolysed to improve absorption. It contains high levels of the key amino acid hydroxylysine. Collagen is a structural protein found in several connective tissues in the body including bones, cartilage, gums, skin, tendons and blood vessels. Vitamin C contributes to normal collagen formation for the normal function of bones and cartilage. Copper contributes to the maintenance of normal connective tissues and therefore can be beneficial to cartilage.