Sweet potato not only has balanced nutrition, but also has little-known functions such as preventing sub-health, losing weight, bodybuilding and anti-cancer. Sweet potato, also known as sweet potato, sweet potato, sweet potato, sweet potato, sweet potato and so on. It is an annual plant of convolvulaceae, and it is a kind of health food with both medicine and food. Sweet potato contains dietary fiber, carotene, vitamins A, B, C, E, and potassium, iron, copper, selenium, calcium and other trace elements 10. With high nutritional value, it is called the most balanced healthy food by nutritionists. Many girls who love beauty think sweet potatoes are sweet, and they are afraid that if they eat too much, they will get fat. Professor Zhang from the Health Room of Beijing University of Chinese Medicine said that eating sweet potatoes will not only make you fat, on the contrary, it can help you lose weight, keep fit, prevent sub-health, relieve constipation and detoxify. Every100g of fresh sweet potato contains only 0.2g of fat, which generates 99 kilocalories of heat energy, which is about 1/3 of that of rice. It is a good food with low fat and low heat energy, and it can effectively prevent sugar from transforming into fat, which is conducive to weight loss and bodybuilding. Sweet potato contains a lot of dietary fiber, which cannot be digested and absorbed in the intestine. It can stimulate intestinal tract, enhance peristalsis, relieve constipation and detoxify, especially for senile constipation. Professor Zhang particularly emphasized that sweet potato is an alkaline food, and like many fruits and vegetables, it is the most rare. General foods are acidic, such as grain, chicken, duck, fish and so on. The PH value of human body is 7.34, so eating sweet potato is beneficial to the acid-base balance of human body. Eating sweet potatoes at the same time can reduce blood cholesterol and prevent "modern diseases" such as sub-health, cardiovascular and cerebrovascular diseases. Professor Lin Hongsheng, director of the Oncology Department of Guang 'anmen Hospital of Chinese Academy of Traditional Chinese Medicine and deputy director of the National Cancer Medical Center of Chinese Traditional Medicine, told the reporter that sweet potato is not only nutritious, but also ranks first among anti-cancer foods. There are many introductions in this document. The list of 20 kinds of anticancer vegetables published by National Cancer Research Center of Japan is: sweet potato, asparagus, cauliflower, Chinese cabbage, broccoli, celery, sweet pepper, carrot, cauliflower, amaranth, shepherd's purse, kohlrabi, mustard tuber, tomato, green onion, garlic, cucumber, Chinese cabbage and so on. Among them, sweet potato ranks first. Moreover, Japanese doctors found that the cancer inhibition rate of cooked sweet potatoes was higher than that of raw sweet potatoes through a dietary survey of 260,000 people. Medical workers in China investigated the hometown of centenarians in western Guangxi, and found that all the longevity elders here have a common feature, that is, they are used to eating sweet potatoes every day, even taking sweet potatoes as their staple food. The anticancer mechanism of sweet potato is not very clear, and opinions vary. It is reported that the hospital in Philadelphia, USA, extracted an active substance-androsterone from sweet potato, which can effectively inhibit the occurrence of colon cancer and breast cancer. Another American university study found that there is a substance called dehydroepiandrosterone in sweet potato, which has a definite effect on preventing and treating cancer. Professor Zhang from the Health Room of Beijing University of Chinese Medicine believes that sweet potato has a certain anti-cancer effect, but its anti-cancer "ability" should not be exaggerated and should be treated dialectically, because its mechanism of action has not been fully clarified, and the greatest role of sweet potato should be on losing weight, bodybuilding, preventing sub-health, relaxing bowels and detoxifying. Regarding the anti-cancer effect, Chinese medicine theory holds that it can reduce the accumulation of garbage and toxins in the human body because of its catharsis and detoxification. In this regard, Professor Song Santai, director of the Cancer Center of China Academy of Military Medical Sciences and deputy director of the Cancer Committee of the whole army, also believes that the mechanism and reasons of sweet potato anti-cancer have not yet been scientifically tested. Theoretically, it is speculated that it is rich in dietary fiber, which can relieve constipation and is beneficial to prevent cancers such as colon cancer. Eating sweet potatoes correctly is also particular. First, we must pay attention to steaming thoroughly. Because the cell membrane of starch in sweet potato is not destroyed by high temperature, it is difficult to digest. Moreover, the gasification enzyme in sweet potato will not be destroyed by high temperature, which will cause discomfort after eating. Second, it should be noted that excessive or unreasonable consumption of sweet potato will cause abdominal distension, heartburn, pantothenic acid, stomach pain and so on. Therefore, it is not advisable to eat too much. People diagnosed by TCM as dampness blocking the spleen and stomach and qi stagnation should eat carefully. The disadvantage of sweet potato is the lack of protein and lipids, but today people are rich and no longer take sweet potato as their staple food, and their lack of nutrition can be supplemented by other diets. For example, eat milk and sweet potatoes at the same time, because milk is rich in protein and fat. 1. Boiling sweet potatoes can cure heat jaundice. 2. 250 grams of sweet potato pages, fried in oil and salt, once eaten twice a day, can cure constipation. 3. Raw sweet potato leaves, mashed, brown sugar and belly button stickers can cure constipation. 4. Proper amount of dried sweet potato vine and water arrow can quench thirst. 5. Mix with sweet potato powder every morning and evening to treat nocturnal emission and stranguria. 6. Fresh sweet potato leaves 90 ~ 120g, boiled in water, can cure malnutrition and night blindness in children.