Abstract
Collagen is the most abundant protein in the animal body, is the cartilage, tendon and ligament of the connective tissue and the key structural component of the skin. According to the source, collagen can be divided into terrestrial collagen and marine collagen, different sources of collagen in the safety and use of differences. In recent years, with the improvement of People's living standard, the demand of collagen products in cosmetics and health products industry is increasing, and the market income is increasing year by year. Based on the structure and classification of collagen, this paper mainly introduces the differences of different types of collagen in application, the aim is to provide a reference for people to choose which type of collagen to buy according to their needs.
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