Diet-Food Collagen Hydrolyzate is one of the best sources of collagen proteins easily absorbed by the body. Collagen can be used by both physically active people and people who care for their hair, skin, nails, bones and joints. Collagen constitutes as much as 30% of the total mass of human protein and 70% of the mass of proteins in the skin itself. What is collagen used for? It is most helpful in protecting, strengthening and improving the density of bones and teeth, joints, the elasticity of the skin, hair and nails, as well as reducing and delaying the formation of wrinkles. Country of origin: Italy