... 2300Da Certificate: HACCP, ISO, MSDS, QS Fast delivery Pig Skin Collagen 1.Physiologic function and basic facts of hydrolytic ... tension property, forming the most important structural material of the skin, skeleton, cartilage, tendon, ligament, and blood vessels. ... , enhancing immunity, promoting the collagen metabolism in the skin and skeleton, protecting the joints and preventing osteoporosis. It ...