Sweet potato has very rich nutritional value. Regular consumption of sweet potatoes can play a role in slimming. Sweet potato contains a lot of dietary fiber that can't be digested and absorbed in the intestine, which can stimulate the intestine, increase intestinal peristalsis and promote defecation. Dietary fiber in sweet potato can also help us to accelerate the burning of body fat, and can also effectively prevent the sugar in the body from being converted into fat. But we don't recommend eating sweet potatoes as a staple food. Although the nutritional value of sweet potato is rich, the nutritional components are relatively simple, and the contents of protein and fat in sweet potato are relatively low. If you take sweet potato as the staple food every day, your body is prone to malnutrition. We should keep at least twelve kinds of food every day, and at least three kinds of beans, potatoes and cereals every day. Therefore, we can't just take sweet potato as the staple food, we should match the thickness in the process of diet, and often eat fresh vegetables and fruits. Sweet potato contains amino acids that rice flour does not have. Sweet potato with rice flour can fully supplement the protein needed by human body. In addition, sweet potato has a high sugar content, and excessive consumption will lead to a large amount of gastric acid secretion, causing stomach discomfort, spitting sour water and heartburn. Sweet potato also contains an oxidase substance, which will produce carbon dioxide gas in the human intestine, leading to hiccups, exhaust and bloating, so sweet potato should not be eaten excessively. Therefore, sweet potato can not be eaten as a staple food, but can be eaten together with rice noodles and the like, and at the same time increase the intake of fresh vegetables and fruits.