According to the Chinese Dietary Guidelines recommendation, adults are advised to drink 300-500 ml of milk or milk products a day. Milk intake is very important for human health, so the Chinese Dietary Guidelines recommend that adults consume about 300-500 milliliters of milk and its products a day to ensure an adequate supply of nutrients. Milk (average value) is rich in nutrients. Each 100 ml of milk contains 54 calories, of which 3.4 grams of carbohydrates, 3 grams of protein, 3.2 grams of fat, 15 milligrams of cholesterol, 104 milligrams of calcium and 0.3 milligrams of iron. In addition, milk contains a large number of minerals and vitamins, moderate consumption can be for the promotion of human health, to maintain the normal functioning of the body. However, it is not advisable to drink too much milk, otherwise it may lead to nausea, vomiting, abdominal pain, bloating and other indigestion symptoms. At the same time, whole milk contains more fat, after a large amount of intake can easily lead to excessive fat intake, triggering obesity and other health problems. Some people are lactase deficient and are prone to lactose intolerance related gastrointestinal symptoms after large intake of milk. Those who are allergic to milk should not consume milk.