Collagen is a biopolymer, the main component of animal connective tissue, and the most abundant and widely distributed functional protein in mammals, accounting for 25% ~ 30% of the total in protein, and even more than 80% in some organisms. Protein powder is generally made from protein such as purified soybean protein, casein, whey protein (lacking isoleucine) and pea protein, or the above-mentioned protein, and is rich in protein.
Protein powder is an additive, and collagen is a kind of protein family. At present, it has been found that at least 30 kinds of genes encoding collagen chains can form more than 16 kinds of collagen and their distribution in tissues (2 molecules). According to its structure, it can be divided into fibrous collagen, basement membrane collagen, microfibril collagen, anchor collagen, hexagonal collagen, non-fibrous collagen and transmembrane collagen.
Animal tissues from livestock and poultry are the main way for people to obtain natural collagen and collagen peptides. Moreover, excessive intake of additive protein is not only wasteful, but also harmful to human health.
Due to the differences in amino acid composition and crosslinking degree, aquatic animals, especially their processing wastes, such as skin, bone and scales, contain rich collagen, which has many advantages that livestock collagen does not have. In addition, collagen from marine animals is obviously superior to collagen from land animals in some aspects, such as low antigenicity and hypoallergenicity. Therefore, aquatic collagen may gradually replace terrestrial collagen.
There are many types of collagen, and the common ones are type I, type II, type III, type V and type VII.
Collagen is widely used in food, medicine, tissue engineering, cosmetics and other fields because of its good biocompatibility, biodegradability and biological activity. For example, Ejiao, a traditional collagen health care product in China, is mainly made of donkey skin (in fact, it is the collagen contained in donkey skin), which has a high nourishing and health care function and has the reputation of being one of the three treasures of Chinese medicine.
Protein powder is not magical, and it is harmful to eat at will-People's Network