Fish skins are rich in collagen and are popular as a raw material for skin care products and vegetarian gelatin. Since fish skins are between four and seven percent of the fish’s total weight, they are an endless, sustainable commodity. Collagen is a key component in both vertebrates and invertebrates and is generally found in the tendons, bones, cartilage and connective tissue of mammals. Past studies have shown that collagen represents about 60% of the animal’s body protein and 30% of all the organic matter of the source animal.In dried fish skins, collagen is in its original, untreated form. Chinese practitioners have believed for thousands of years that when skin is damaged, the cure is to consume skin. Popular science has supported that finding in recent decades, as collagen has become more and more popular as a proven health product. Collagen has been shown to strengthen skin, through improving its hydration and elastic properties. Natural wound repair and joint relief are both aided by collagen properties. Collagen in the muscles keeps them strong while less acne is another proven benefit. As mammals age, the body no longer produces collagen as efficiently. A daily collagen supplement is advised. It is clear that people and pets need collagen daily. For dogs, there is no richer source than dehydrated, scale reduced fish skins.