It can promote the growth of teeth and bone marrow, and also contribute to the growth of the body, but it is recommended not to let children drink a lot of pure milk, which is easy to get angry. After all, children are still young and will lead to constipation. Lactose in fresh milk is mainly α-lactose, which can inhibit Bifidobacterium, promote the formation of Escherichia coli and easily induce gastrointestinal diseases in infants. At the same time, minerals in fresh milk will increase the burden on the kidneys, causing children to have symptoms such as chronic dehydration, dry stool and excessive internal heat.