Men who drink milk for a long time can enhance the absorption of protein, calcium and other nutrients, good for health. Milk is a protein-rich food, every 100 ml of milk contains 3.3 grams to 4 grams of protein, are high-quality protein, absorption rate is very high, while containing the body can not synthesize the eight essential amino acids, and the proportion is appropriate. It is a good source of high quality protein for all ages. Milk is rich in calcium, with about 105 mg of calcium per 100 ml of milk, and high-calcium milk only goes higher on top of that. So milk is also a good source of calcium supplements, especially for older people, and postmenopausal women need to increase their calcium supplements moderately. Drinking more milk at this time is very helpful in strengthening bones. Milk also contains other nutrients such as fat and carbohydrates, which have a higher nutritional value and more comprehensive nutrient composition. The Chinese Dietary Guidelines recommend a daily intake of 300 milliliters of milk per adult.