Sweet potato is sweet and warm, which can moisten the intestines and relieve constipation, strengthen the stomach and replenish qi. Containing more cellulose, it can absorb water in the intestine, increase the volume of feces, and cause laxative effect. Among them, rich fiber is helpful for defecation. Sweet potato contains a lot of sugar, protein, vitamins and minerals, carotene and vitamin C, anticancer substances that inhibit the growth of cancer cells, and a lot of dietary fiber, so it can prevent constipation and intestinal cancer; At the same time, it can reduce calorie intake and is one of the best foods to lose weight.