1. Sweet potato is rich in dietary fiber and has a special function of preventing sugar from being converted into fat; Can promote gastrointestinal peristalsis and prevent constipation. Can be used for treating hemorrhoid and anal fissure, and has certain effect on preventing rectal cancer and colon cancer.

2. Sweet potato is rich in starch, carotene, potassium, iron and other trace elements 10, and rich in lysine and carotene, which can promote the normal maturation of epithelial cells, inhibit the abnormal differentiation of epithelial cells, eliminate oxygen free radicals with carcinogenic effect, prevent carcinogens from combining with protein in the nucleus, and promote the enhancement of human immunity.

3. Sweet potato contains the physiologically active substance "hydroepiandrosterone", which can effectively prevent colon cancer and breast cancer.

Next let's talk about the nutritional value of sweet potato.

1. Sweet potato is rich in carotene, and vitamin A is converted from carotene, which can maintain normal visual function.

2. Sweet potato is rich in mucin and glycoprotein, and this mixture of polysaccharide and protein has a special protective effect on human body. Mucin can prevent arteriosclerosis, slow down the aging of human organs and improve the immunity of the body. Glycoprotein has good anti-mutation, hypolipidemic and immune enhancement effects. )

3. Sweet potato is also rich in potassium, which can alleviate the disadvantages caused by excessive salt intake and is an important element to protect the heart.

Finally, who must not eat sweet potatoes! ! ! ! ! !

1. Diabetic people should not eat sweet potatoes. Sweet potato has a high sugar content, and eating too much will aggravate diabetes.

2. People with weak spleen and stomach can't eat. Sweet potato also contains an oxidase, which will produce a lot of carbon dioxide gas in the gastrointestinal tract, which is easy to cause symptoms such as bloating and snoring.

3. People with gastric ulcer and abdominal distension should not eat sweet potatoes. Sweet potato sugar will produce a lot of gastric acid in the stomach, increasing the pressure in the stomach. For people with bad stomach, it will stimulate the ulcer surface or gastric mucosa, leading to stomach discomfort.