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 potassium. Sweet potato contains a lysine substance, but rice and flour just lack this lysine. Eating sweet potatoes with rice noodles 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 freckles and senile plaques. 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. Eating sweet potatoes often helps to maintain normal folic acid levels in the human body. Eating sweet potato in daily diet can quickly neutralize the acidic substances produced by rice, flour, meat, eggs and other foods in human body, maintain the weak alkali balance of human blood, and at the same time convert carotene into vitamin A.

Diabetic patients can't eat sweet potatoes, which have high sugar content. Excessive consumption will lead to an increase in blood sugar in the body and aggravate the condition of diabetes. If you just want to eat sweet potatoes, you must calculate the sugar intake of the day to avoid the phenomenon of excessive sugar.

Those with dampness blocking the spleen and stomach, qi stagnation and blood stasis should eat sweet potatoes carefully. Sweet potato contains a lot of dietary fiber and starch, which is not easy to digest when eaten too much, and also produces a lot of stomach acid, which aggravates the symptoms of stomach discomfort. In addition, sweet potato has a high sugar content and will ferment in the intestine. Sweet potato contains an oxidase substance, which will produce carbon dioxide gas in the intestine if eaten too much, causing abdominal distension, burping and exhaust. Therefore, eating too much sweet potato is easy to accumulate food, which causes certain pressure on the stomach. Therefore, it is best for such people to reduce their consumption or temporarily avoid eating sweet potatoes.

People with diarrhea are not suitable for eating sweet potatoes. Sweet potato contains a lot of dietary fiber, which can not be digested and absorbed in the intestine, which will stimulate the peristalsis of the intestine and aggravate the symptoms of diarrhea, which is not conducive to the recovery of the body.

Patients with gastrointestinal diseases, such as gastric ulcer and hyperacidity, should avoid eating sweet potatoes, so as to avoid excessive gastric acid secretion in the stomach after eating sweet potatoes, which will increase the area of gastric ulcer and lead to aggravation of gastric diseases.

People with poor gastrointestinal function and weak spleen and stomach should also be cautious when eating sweet potatoes, and must eat them in moderation. If they eat too much, it will increase the burden on their stomachs, which is not good for their health. Eating sweet potatoes in moderation is good for the stomach.