1, anti-cancer. Sweet potatoes are rich in anti-cancer nutrients, such as beta-carotene, vitamin C and folic acid. If the body's folic acid content is too low, will increase the risk of cancer, and often eat sweet potatoes are conducive to maintaining the body's normal level of folic acid. 2, help prevent cardiovascular disease. Sweet potatoes are rich in potassium, beta-carotene, folic acid, vitamin C and vitamin B6, all five components help prevent cardiovascular disease. Potassium helps the body cell fluid and electrolyte balance, maintain normal blood pressure and heart function. beta-carotene and vitamin C have anti-lipid oxidation, preventing atherosclerosis. Supplementation of folic acid and vitamin B6 helps to reduce the level of homocysteine in the blood, which can damage arterial blood vessels and is an independent risk factor for cardiovascular disease. 3, help stimulate the intestinal tract, treatment of constipation. Sweet potato contains a lot of dietary fiber, in the intestine can not be digested and absorbed, can stimulate the intestinal tract, enhance peristalsis, laxative detoxification, especially for senile constipation has a better effect. 4, there is a certain anti-diabetic effect. Research shows that white sweet potato can effectively inhibit the rise of blood sugar levels, improve insulin sensitivity. Diabetic patients can consume sweet potatoes, but should also pay attention to not excessive.