Nutritional value of milk: 1. protein in milk is mainly casein, albumin, globulin, milk protein, etc. Among more than 2 kinds of amino acids, there are 8 kinds of amino acids necessary for human body. Milk protein is a complete protein, and its digestibility is as high as 98%. 2. Milk fat is high-quality fat, its digestibility is above 95%, and it contains a lot of fat-soluble vitamins. 3. Lactose in milk is galactose and lactose, which are the most easily digested and absorbed sugars. 4. Minerals and trace elements in milk are dissolved, and the content ratio of various minerals, especially the ratio of calcium and phosphorus, is suitable, which is easy to digest and absorb. 5. Some substances in milk have protective effects on middle-aged and elderly men. Men who drink milk tend to be slim and full of physical strength, and the prevalence of hypertension and cerebrovascular diseases is also low. 6. Calcium in milk is the most easily absorbed, and the collocation of various minerals such as phosphorus, potassium and magnesium is also very reasonable. Pregnant women should drink more milk, and middle-aged women before and after menopause often drink milk to slow down bone loss. Studies have shown that taking milk and Xinxibao tablets together can promote the absorption of calcium.