It is best to choose whole milk powder for 12-year-olds. Milk powder is made from fresh cow’s milk as the main raw material, with whey protein powder and other substances as auxiliary ingredients, after purification and standardization, sterilization, concentration, drying and packaging processes. Whole milk powder contains essential amino acids and is also rich in minerals such as iron, zinc, magnesium and calcium, as well as vitamin D. It is helpful for children’s physical development and improves sleep quality. Before buying milk powder, parents should pay attention to the content of various nutritional elements on the package. The content of nutrients in substandard milk powder is usually not up to standard and may have an impact on the growth and development of the child’s body. The nutritional ratios of milk powder needed for growth and development are not exactly the same for children at different times. In addition, parents need to pay attention to the package label and logo is complete, unqualified products are not beneficial to children’s health. In addition, in addition to milk powder, parents should pay attention to the child’s daily dietary intake of nutrition should be balanced, you can eat more protein-rich foods, such as eggs, lean meat, etc., to promote the growth and development of children, and should eat more fresh fruits and vegetables, such as oranges, grapes, cucumbers, celery, etc., to supplement the body with a variety of trace elements and vitamins.