It is best to drink pure milk. The milk content of modified milk is lower than that of pure milk, and because some food additives are added to modified milk, many nutrients are lost, so it can not provide enough nutrition. Modified milk: It is made of reconstituted milk, that is, dairy products replace raw milk, and various food additives are added, which contain nutrients such as fat, protein and calcium. The shelf life is long, but the milk content in modified milk is lower than that in pure milk, and some nutrients will be lost because of the addition of food additives. Drinking denatured milk for a long time can't provide enough nutrition for children, and children's resistance is low, which may affect their health. Pure milk: It is a natural dairy product, which contains no food additives and is rich in nutrients such as protein, fat, calcium, phosphorus and vitamins, and has a short shelf life. Because no food additives are added, the nutritional components are higher than those in denatured milk, which is more conducive to children's absorption, help children sleep and help children's health. When drinking pure milk for children, it is recommended to heat the milk to avoid the symptoms of diarrhea and abdominal pain when drinking cold pure milk.