A medicinal book from the Nanliang Dynasty in China recorded the medicinal effect of "fish skin"; by the Tang Dynasty, it had been used as one of the tributes. Traditional Chinese medicine theory believes that "fish skin" is sweet in taste. It is mild in saltiness and has nourishing effects; in terms of dietary therapy, "fish skin" is rich in protein and a variety of trace elements. Its protein is mainly composed of macromolecules of collagen and mucopolysaccharides. It is a good skin care and health care product for women. , medical research has found that the white blood cells-leucine in "fish skin" has anti-cancer effects.
Fish skin is rich in protein and a variety of trace elements. Its protein is mainly composed of macromolecular collagen and mucopolysaccharides. It is a good skin care and health care product for women. Medical research has found that "fish skin" The leukocyte hormone-leucine in it has anti-cancer effects. Fish skin is rich in collagen. Each 100g of dry shark skin contains 67.1g of protein and 0.5g of fat. The protein is collagen, which is very good for beauty and calcium supplementation. An acid-soluble fish skin collagen is made from marine fish skin as raw material. It is chopped, soaked in NaCl solution to remove impurities, and degreased with ethanol and acetone. Then it is soaked and extracted with a mixture of citric acid and acetic acid, and then centrifuged to obtain acid-soluble fish skin. The skin collagen solution is then solid salted out with NaCl to obtain the acid-soluble fish skin collagen precipitate. Finally, the acid-soluble fish skin collagen precipitate is dissolved in an acetic acid solution, and then dissolved in Na↓[2]HPO↓[4] (PH8.6 ), or undergo ultrafiltration through a cellulose acetate hollow fiber membrane with a molecular weight greater than 60,000. The solid obtained by dialysis or ultrafiltration can be vacuum freeze-dried to obtain the product. The product is white, has no fishy smell, and becomes sponge-like after freeze-drying. The purity of collagen products reaches ≥97%. Collagen is rich in glycine, proline and hydroxyproline, and its hydrolyzate also contains physiologically active peptides. The molecular weight of collagen is greater than 60,000.
Food effects: Fish skin is sweet and salty in taste and neutral in nature; it has nourishing effect; it is effective in stomach and lung diseases.
Other related: Nanliang's "Famous Doctors" records fish skin as a medicine, and has a deep understanding of its nature, flavor and efficacy. According to the "New Book of Tang", fish skin has been used as a tribute. Nowadays, fish skin is often used in banquets as the main dish, second only to fish maw. "Suixiju Diet Manual" points out that fish skin can "resolve various fish poisons, kill insects, and relieve fatigue".