The main benefits and effects of eating sweet potatoes include promoting bowel movement and replenishing sugar. The main components of sweet potato are starch and crude fiber. After entering the gastrointestinal tract, the crude cellulose can promote the absorption of water by the intestinal mucosa so that the stool can be shaped, and the crude cellulose can promote gastrointestinal peristalsis, so eating sweet potatoes can promote defecation and laxity. But too much eating sweet potatoes, may lead to some people appear bloating, so should eat sweet potatoes in moderation. Sweet potato contains a large amount of starch, is a carbohydrate, after entering the body can be metabolized into a large amount of glucose, absorbed by the gastrointestinal tract for glucose metabolic pathway, for cell metabolism to provide energy. Therefore, people with diabetes or abnormal glucose tolerance should not eat too much sweet potato to avoid causing blood sugar to rise significantly in a short period of time.