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Collagen peptide is the product of collagen protein disintegration under certain external conditions. It also has biological activity. Compared with collagen, collagen peptide has smaller molecular weight and is easily absorbed by human body.
Collagen is a kind of natural protein, which widely exists in the skin, bone, ligaments and blood vessels of animals. Collagen has strong biological activity, can participate in cell migration, differentiation and proliferation, and can give certain mechanical strength to bone tendon, cartilage and skin. Collagen has attracted much attention in the food industry because of its weak antigenicity and good biocompatibility, as well as its multiple amino acids, which can be digested.
However, the high molecular weight of collagen (about 1000D) limits the absorption and utilization of collagen. In order to better play the role of collagen, people decompose collagen into collagen peptide with molecular weight less than 3000D by chemical or enzymatic hydrolysis technology, which has better digestibility and absorption.