Nutritional value Fish skin is rich in protein and various trace elements, and its protein is mainly composed of macromolecular collagen and mucopolysaccharide, which is a good product for ladies' beauty and skin care. In recent years, medical research has found that leucine, the white blood cell in "fish skin", has anti-cancer effect. Suitable people can eat fish skin with edible effect, which is sweet, salty and flat. Has nutritional function; It has therapeutic effect on stomach diseases and lung diseases. Other related fish skins collected from the Records of Famous Doctors in Nanliang have a deep understanding of their properties, tastes and effects. According to New Tang Book, fish skin has been used as a tribute. Nowadays, fish skin is often used as the main course at banquets, second only to fish belly. "Life Taste Diet Spectrum" points out that fish skin can "detoxify all kinds of fish poisons and kill insects, the more futile it is".