Sweet potato contains protein, starch, amino acids, pectin, dietary fiber and other vitamins and minerals, as well as more than ten kinds of trace elements such as calcium, iron, copper, selenium and phosphorus. Sweet potato is also rich in lysine and polysaccharide. Sweet potato contains a lysine, but rice and flour just lack this lysine. Sweet potato mixed with rice flour can fully supplement protein. Sweet potato contains a lot of dietary fiber, which cannot be digested and absorbed in the intestine. Can stimulate the intestine, enhance peristalsis and promote defecation. Sweet potato is famous for its low calorie and high fiber. It contains almost no fat and cholesterol and is rich in unsaturated fatty acids, which is unmatched by other foods. Dietary fiber can not only prevent the absorption of fat and cholesterol in the intestine, but also decompose cholesterol in the body, promote lipid metabolism, effectively prevent overnutrition and resist obesity, thus achieving the purpose of losing weight. Dietary fiber in sweet potato also has the special function of preventing sugar from being converted into fat. In addition, sweet potato contains a lot of starch, which can produce satiety after eating, thus reducing food intake and reducing weight. Sweet potato contains a substance similar to estrogen, which has a certain effect on protecting human skin and delaying aging. Eating sweet potatoes can inhibit the production of melanin and prevent the appearance of freckles and age spots. Sweet potato is also rich in potassium, which can alleviate the disadvantages caused by excessive salt intake. Potassium and sodium are important elements that affect blood pressure, and taking enough potassium can eliminate excess sodium.

Sweet potato tastes sweet and has rich nutritional value. It is called "the most balanced healthy food" by nutritionists. When we eat sweet potatoes, we should pay attention to several problems. Sweet potatoes must be cooked before eating, and raw sweet potatoes should not be eaten, because there is a lot of starch in sweet potatoes, and the cell membrane of starch has a hard substance, which is difficult to be digested and absorbed by the human body if it is not destroyed by high temperature. In addition, starch contains an oxidase substance, which will produce carbon dioxide gas in the human intestine. When cooking sweet potatoes, we can extend the cooking time of sweet potatoes appropriately to destroy this oxidase substance. Avoid abdominal discomfort such as bloating, burping, spitting sour water and heartburn after eating sweet potatoes. Don't continue to eat sweet potato when there are dark spots on the skin. Because the skin of sweet potato has black spots, it is generally formed because sweet potato is attacked by black spots during its growth. Using such sweet potatoes can easily lead to human poisoning. In addition, it is not recommended to eat sweet potatoes with moldy skin. Eating too much sweet potato will lead to bloating and exhaust. That's because sweet potato contains an oxidase, which will produce carbon dioxide in the intestine and then excrete it, so don't eat too much sweet potato at a time. Because sweet potato has high sugar content, eating too much will lead to a large amount of gastric acid secretion, and too much gastric acid will cause discomfort and stimulate gastric contraction. In some acid reflux feed pipes, acid water splashing may occur. Sweet potato has a high sugar content, and eating it on an empty stomach will produce a lot of stomach acid. When there is too much gastric acid, it will stimulate the gastric mucosa, cause gastric acid reflux and make people feel heartburn. Therefore, in the process of eating sweet potatoes, you can match some pickles, which can effectively inhibit gastric acid. Sweet potato can't be eaten with persimmon. It will react with tannin in persimmon, causing precipitation and coagulation to form a lump, which may form a gastrolith. If you eat too much, it will also cause gastric ulcer or gastric bleeding. Sweet potato can't be eaten with crabs. When they are used together, it may cause abdominal discomfort such as vomiting, diarrhea, abdominal distension and abdominal pain, and even lead to stomach stones. Eating sweet potatoes and eggs can easily cause indigestion and even abdominal pain. Eating sweet potato and chicken together will affect the stomach and cause abdominal pain, diarrhea and other symptoms. Sweet potatoes cannot be eaten with wine. Sweet potato contains an oxidase substance, which reacts with alcohol and easily causes a series of gastrointestinal discomfort symptoms such as burping, bloating, heartburn, nausea and nausea. It is best not to eat sweet potatoes within three hours after drinking. In addition, sweet potatoes should also try to avoid eating with tomatoes and bananas to avoid abdominal discomfort.