Promotes Healthy Skin* Clinically Tested Collagen peptides from types 1 and 3 bovine collagen are well-known for their roles in bone, joint and skin health.* As the most abundant protein in mammals, collagen makes up about 30% of the body's protein. Studies indicate that hydrolyzed collagen may help to support strong bones and healthy joints as well as skin smoothness and hydration.* Natural color variation may occur in this product. This product is sold by weight not volume.