Sweet potato is cheap, is a very grounded civilian food, more importantly it is also very tasty, almost no one can resist the aroma of baked sweet potato. In addition, sweet potatoes have very high nutritional value, “longevity food”, “anti-cancer star”, “the best vegetables”… …has so many reputation of sweet potato, in the end what health function? Eat sweet potatoes have what to pay attention to it? A, sweet potato nutrition and health function Sweet potato, also known as groundnut, white potato, sweet potato, sweet potato, sweet potato, sweet potato, etc., for the spinach annual plant, containing dietary fiber, carotene, vitamin A, vitamin B, vitamin C, vitamin E, as well as potassium, iron, copper, selenium, calcium, etc., the nutritional value is very high. Traditional medicine in China believes that sweet potato is “calm and warm, non-toxic, strengthens the spleen and stomach, strengthens the muscles and bones, nourishes the blood and the middle, and prolongs life”. The compendium of materia medica” records that sweet potato has the efficacy of “tonic deficiency, benefit energy, strengthen the spleen and stomach, strengthen the kidney yin”. Research shows that sweet potato has a variety of health functions: sweet potato nutrition and health functions 1, cancer prevention Japan’s National Cancer Prevention Institute published a list of 20 kinds of anti-cancer vegetables, of which cooked sweet potato ranked first (98.7% efficiency). Diet with anti-cancer nutrients are beta-carotene, vitamin C and folic acid, sweet potatoes are rich in these three. 2, good for heart health Sweet potatoes are rich in potassium, beta-carotene, folic acid, vitamin C and vitamin B6, all these nutrients help prevent cardiovascular disease. Such as potassium helps maintain the body’s cellular fluid and electrolyte balance, maintain normal blood pressure and heart function. beta-carotene and vitamin C can resist lipid oxidation, prevent atherosclerosis. 3, laxative Sweet potatoes are rich in starch, vitamins, fiber, but also rich in magnesium, calcium, phosphorus mineral elements and linoleic acid, etc.. These substances are very effective in the prevention and treatment of habitual constipation in old age. Sweet potatoes contain a large amount of dietary fiber, can stimulate the intestinal tract, enhance peristalsis, laxative detoxification. 4, weight loss Experimental evidence, obesity leads to the accumulation of visceral fat in the human body, will reduce the hormone released by adipocytes, namely lipocalin, lipocalin not only helps inhibit vascular sclerosis, and can promote the body’s consumption of fat and sugar, sweet potatoes contain reverse osmosis protein, the role of human lipocalin back up. Second, eat sweet potatoes what is important? 1, do not buy sweet potatoes with spots on the surface In the purchase of sweet potatoes, you can give priority to pick spindle-shaped, smooth surface of sweet potatoes. If the sweet potato skin is black or brown spots, it is contaminated by black spot bacteria, do not buy. Black spot bacterium toxicity can make sweet potatoes hard, bitter, more toxic, and whether boiled or baked, the biological activity is not easy to be destroyed. 2, cooked sweet potatoes are more beneficial Sweet potatoes contain a large amount of starch, wrapped in a tough skin outside, was cooked, before it is easy to be digested and absorbed by the body. In addition, in the sweet potato steaming and heating process, most of the sweet potato oxidase will be destroyed, which can reduce the production of gas, eating is not prone to flatulence, acid reflux and other symptoms of gastrointestinal discomfort. 3, baked sweet potatoes do not eat with skin baked sweet potatoes aroma, so that people can not help but drool, especially when the outside of the baked “sugar oil”, sweet potato skin after baking, this time with sweet potato skin together, the taste is to make people want to eat. But nutrition experts recommend that baked sweet potatoes are best not to eat with the skin, because the sweet potato skin contains more alkaloids, too much consumption will lead to gastrointestinal discomfort. Especially after the black spot bacteria contamination of sweet potatoes, after baking is not suitable to identify, so there are black spots or baked burnt sweet potatoes are not eaten. 4, with eating better sweet potatoes also have their shortcomings, is the protein and fat content is low. Sweet potatoes contain dietary fiber will also take away some of the protein, calcium and other important nutrients in other foods. Therefore, long-term consumption of a large number of sweet potatoes will affect the absorption of certain important substances, resulting in malnutrition. Therefore, it is best to eat with rice and noodles, and control the amount of consumption at a time, can play a complementary role of protein.