Milk helps children’s physical growth. It is more appropriate for children to drink 200 to 500 milliliters of milk per day, and drinking too much milk can easily lead to intestinal flatulence and over-nutrition. Milk is rich in protein, fat and vitamins and other nutrients, milk fat in milk is easy to be absorbed by the body, drinking milk can promote children’s calcium absorption, bone development and sleep. It is recommended to drink milk twice a day in the morning and evening, with a total amount of 200-500mL, if you drink too much milk every day, it will cause intestinal flatulence, overnutrition and other negative consequences. In addition, teenagers in the growth and development stage of all aspects of nutrition should be balanced, in addition to drinking milk, but also eat more fresh fruits and vegetables, more outdoor sports activities, to ensure that every day have enough rest, keep a happy mood.