... Good solubility in water Collagen(Extracted from Skin or Gristle of Marine fish, Bovine, Porcine, and Chicken) Product Introduction ... collagen. Collagen can be extracted from Skin or Gristle of fresh Marine fish , Bovine, Porcine, and Chicken , ... animals food to promote its growth and high quality Certificate of Analysis ItemSpecificationTest ResultsAppearanceOff-White to Beige Fine PowderBeige Fine ...