... found in the connective tissues in the body, including the skin, bones, cartilage, tendons, and ligaments. But with aging, ... absorption from man-made collagen. Collagen can be extracted from Skin or Gristle of fresh Marine fish , Bovine, Porcine, and ... very edible. Take different techniques, there are Hydrolyzed Collagen, Active Collagen, Collagen Peptide, Geltin and so on.Applications:1.Functional ...