... :Porcine,Bovine,Chicken,Bone,Fish Pure Collage Molecular Weight 2000~5000D Pure Colalgen Pure Collagen, is a water-soluble ... that is the product of enzyme catalyzed of gelatin. Pure Collagen is extensively applied in food, medicine, daily chemical ... burning and protecting membrane, operation seaming twine, contraception sponge, styptic medical sponge, bandage etc..info at onlychemcn com Pure Collagen