Constipation patients when drinking milk powder, it is best to choose milk powder containing high oligofructose content, this helps the intestinal tract. Constipation is caused by hard feces, and this is due to insoluble substances in feces, which mainly come from palmitoleic acid and stearic acid that cannot be absorbed in the intestines and combine with calcium to form calcium soap. Therefore, if the food contains high levels of palmitoleic and stearic acids, the stool will be harder. It is important to control palmitoleic acid and stearic acid in the diet. When selecting milk powder, avoid milk powder with ingredients such as palm oil, whole milk powder or milk fat, and try to use refined vegetable oil formula, which is not hot to drink, and the absorption of calcium and fat will be better, which will help the development of bones and the absorption of energy. When constipation is mild, it does not need to be treated with medication, but requires a change in lifestyle habits, which can include eating more foods rich in dietary fiber and drinking more water, as well as exercising appropriately and developing the habit of regular bowel movements, thus helping to relieve constipation. When constipation is more serious, it needs to be treated by relevant medications, and common medications include lactulose, castor oil, mosapride, bifidobacteria and so on.