Fish scales are rich in nutrition, containing more protein, lecithin, various fatty acids, minerals, vitamins, colloid and trace elements. Among them, the content of calcium and phosphorus is very high. Fish scale membrane is a good nutritional product for both medicine and food.
Fish scales have been used for dietotherapy and have a long history in China. As early as "Records of Famous Doctors", there was such a record: "Take the scales of crucian carp and carp and boil them into jelly with slow fire. Women can treat leukorrhagia during metrorrhagia after eating, and have curative effects on purpura, gingival bleeding, epistaxis and other diseases. The scales of shad stuck to the wound to stop bleeding. Lecithin in fish scales can enhance people's memory to a certain extent, and can control the degradation speed of brain cells, which has certain anti-aging effect. Unsaturated fatty acids in fish scales can help transport and emulsify blood fat in the form of binding proteins, reduce the deposition of cholesterol on blood vessel walls, and have many medicinal effects such as preventing arteriosclerosis, hypertension and heart disease. Children often eat fish scales to prevent rickets.