Sodium caseinate, also known as caseinate, sodium caseinate or sodium casein, is a water-soluble emulsifier. It has the functions of stabilizing, strengthening proteins, thickening and foaming, and is also a protein nutritional fortifier. The usage amount in beverages such as coconut juice and almond milk is 0.2% to 0.3%. Sodium caseinate, like casein, is a high-quality protein source used in cereal foods such as bread and biscuits. Due to its water solubility, its applications are far broader than those of casein. It can be added to cereal foods as a nutritional fortifier to formulate high-protein cereal foods, which are special nutritional foods for the elderly, infants, and diabetic patients. It is used for grain products such as bread and biscuits, with a rate of 0.2% to 0.5%. The raw materials used for Western-style pastries, doughnuts, chocolates and other pastries range from 0.5% to 5.0%. Sodium caseinate is made from milk protein. After hydrolysis and absorption, it can participate in the normal metabolism of the body.