Milk is rich in nutrients such as protein, calcium and vitamins, which is very important for the health of bones, muscles and skin. However, people of different ages, sexes and activity levels have different nutritional needs. For example, growing teenagers and pregnant women may need more calcium and protein, so they may need to drink more milk. If you need to drink about 500- 1000 ml of pure milk every day, it is more appropriate to buy 250 ml and drink 2-4 boxes every day. Adults drinking 1-2 bottles of pure milk (250 ml per bottle) every day can provide enough nutrition and help maintain bone health and body energy. If you have problems such as lactose intolerance or milk allergy, you need to limit or avoid drinking pure milk; If you have diseases such as osteoporosis and high blood pressure, you may need to eat more milk to help improve your condition.