Fish scale collagen is extracted from fish scale without any additives, preservatives, cholesterol and fat. The prepared small molecule collagen peptide is easy to dissolve, easy to absorb and so on. The collagen peptide prepared by enzymic hydrolysis of tilapia scales can be used in health food, which has the effect of reorganizing the skin connective tissue structure, promoting the basic metabolism of somatic cells and restoring the mechanism. In addition, collagen also plays a role of calcium supplement. Human bones are mainly composed of water, minerals and organic matter, and collagen is the main component of organic matter in bones. Therefore, calcium supplement begins with collagen supplement.
Using tilapia scale as raw material, collagen peptide was prepared by using papain and fish scale collagenase hydrolysis process, and the properties of collagen were analyzed. It was concluded that the collagen peptide prepared by papain applied to tilapia scale enzymatic hydrolysis has good water absorption, water retention and foaming stability, which has a good application prospect in the health care product industry.