In general, children over the age of three and a half usually eat a normal diet, can drink milk powder or not, and will not have an impact on the normal development of the body. In general, children over three and a half years of age can already get the nutrients needed for physical development through normal diet, at the same time, the nutrition contained in the formula is relatively comprehensive, continue to drink milk powder can help the child more comprehensive supplementation of nutrients. Parents can choose to meet the child’s age to feed the milk powder. However, it should be noted that at this time the child should be properly given to the formula feeding, can be based on a normal diet, supplemented by milk powder, so that the child slowly develop the habit of normal diet. At the same time, some special people, such as children with phenylketonuria, need to be under the guidance of the doctor, according to the specific circumstances of the disease, choose to feed the milk powder that does not contain phenylalanine. To summarize, children over three and a half years old can drink milk powder, but should be a normal diet for the main milk powder as a supplement, the existence of special conditions, but also under the guidance of the doctor to feed correctly.