The key is absorption. You can take some drugs that are beneficial to the development of intestinal flora, adjust them, and eat foods rich in protein for malnutrition, such as skim milk, formula milk, soybean milk, egg yolk powder, fish paste, liver paste and meat paste. 2. Malnutrition Eat fatty foods, such as vegetable oil, cream and various meat foods. 3. Malnutrition Eat foods rich in carbohydrates, such as rice soup, batter, lotus root powder, porridge, vegetables and fruit soup. 4. Malnutrition Eat foods rich in vitamins and minerals, such as fresh fruit juice and vegetable juice.