The most effective laxative foods can be divided into the following categories. First, sweet potato is rich in dietary fiber, which can effectively reduce blood lipid and cholesterol content and reduce body fat. The fiber contained in sweet potato can't be digested and absorbed in the intestine, so it can effectively excrete feces and play a role in relaxing bowels. Secondly, oatmeal is rich in water-soluble fiber, which can effectively promote intestinal movement, absorb cholesterol in the body and excrete it. The third kind is apple, which contains pectin and belongs to soluble cellulose. The fourth kind is white radish, some of which can promote the secretion of gastric juice, and have a strong function of regulating gastrointestinal function, promoting gastrointestinal movement and clearing the bowels and relaxing bowels.