Professor Zhang particularly emphasized that sweet potato is an alkaline food, and like many fruits and green vegetables, it is the most rare. The general food is acidic, such as grain, chicken, duck, fish and so on, and 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 and cardiovascular and cerebrovascular diseases.
Professor Lin Hongsheng, director of the Oncology Department of Guang 'anmen Hospital of China Academy of Traditional Chinese Medicine and deputy director of the National Cancer Medical Center of Traditional Chinese Medicine, told the reporter that sweet potato is not only nutritious, but also ranks first in anti-cancer food. There are many introductions in this literature. The list of 20 kinds of anticancer vegetables published by the National Cancer Research Center of Japan is: sweet potato, asparagus, cauliflower, cabbage, broccoli, celery, sweet pepper, carrot, cauliflower, amaranth, shepherd's purse, kohlrabi, mustard tuber, tomato, green onion, garlic, cucumber, Chinese cabbage, etc. 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. Chinese medical workers have investigated the hometown of centenarians in western Guangxi, and found that the long-lived elderly here have the same characteristics, that is, they are used to eating sweet potatoes every day, and even use them as staple food. The anti-cancer mechanism of sweet potato is not very clear, and there are many opinions. As reported, 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 potatoes, which has a definite effect on the prevention and treatment of cancer. Professor Zhang Hude 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 it should be treated dialectically, because its mechanism is not completely clear, and the greatest effect of sweet potato should be placed on losing weight, bodybuilding, preventing sub-health, relaxing bowels and detoxifying. Regarding the anti-cancer effect, Chinese medicine theory believes 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 no scientific experiments have been done on the mechanism and causes of anticancer of sweet potato. 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 and cooking thoroughly. Because the cell membrane of starch in sweet potato is not destroyed by high temperature, it is difficult to digest. Furthermore, the gasification enzyme in sweet potato will not be destroyed by high temperature, and it 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, stomachache and so on. Therefore, it is not appropriate to eat too much, and those who suffer from dampness blocking the spleen and stomach and qi stagnation in TCM diagnosis should eat carefully.
The disadvantage of sweet potato is the lack of protein and lipid, but today people are rich and no longer take sweet potato as the staple food, and its lack of nutrients 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.
Sweet potato in small medical classics
According to the ancient documents such as Compendium of Materia Medica and Addendum of Compendium of Materia Medica, sweet potato has the effects of "tonifying deficiency, invigorating qi, strengthening spleen and stomach, and strengthening kidney yin", which makes people "live longer and have fewer diseases". It can also tonify the middle energizer, invigorate the blood, warm the stomach and fatten the five internal organs. Contemporary "Chinese Materia Medica" says: "It is sweet in taste and flat in nature. Return to spleen and kidney meridian. " "Buzhong and blood, Yiqi Shengjin, wide stomach, constipation. Indications: spleen edema, sore and swelling, intestinal dryness and constipation. "
History of sweet potato
Sweet potato originated in America, and the first batch of sweet potatoes in Europe was brought back by Columbus in 1492, and then introduced to Africa by Portuguese and Asia by Pacific Islands. Sweet potato was first introduced to China during the Wanli period of the Ming Dynasty. At that time, Chen Zhenlong, an overseas Chinese from Fujian, often went to Luzon (now the Philippines) to do business, and found that the yield of sweet potato produced in Luzon was the highest, so he patiently learned the planting methods from local farmers. Later, after the promotion of the Chen family, sweet potatoes were widely planted throughout the country.
How to eat sweet potato scientifically
1, sweet potato should not be eaten too much at a time, but can be eaten with some Chinese cabbage and radish.
2. When cooking sweet potatoes, put a little alkali in the water, or soak in salt water for 10 minutes before cooking. Cooking time should be more than 20 minutes, or cooked with rice, flour and beans to reduce oxidase. This will not cause bloating.
3, sweet potato should not be eaten as a staple food, rice and steamed bread can be used as staple food, supplemented by sweet potato. This not only adjusts the taste, but also does not have side effects on the stomach.
4. If you eat sweet potatoes alone, you can eat pickles or pickles soup. In this way, it can reduce stomach acid, lighten weight and eliminate discomfort in the stomach.
5, sweet potato should not be eaten with persimmon at the same time, so as not to cause stomach persimmon stones. Because the sugar in sweet potato is fermented in the stomach, it will increase the secretion of gastric acid, and the tannin and pectin reaction in the secret persimmon will precipitate and condense, resulting in lumps, which can cause gastrointestinal bleeding or gastric ulcer in severe cases.
Not everyone likes sweet potatoes, and the market prospect is average. The practices of sweet potato are: baked sweet potato, steamed sweet potato, boiled sweet potato, fried sweet potato sticky, fried sweet potato strips, fried sweet potato slices, fried sweet potato balls, fried sweet potato cakes, cooked sweet potato strips, honey sweet potato, honey sweet potato and so on.
Baked sweet potato, in the cold winter in the north, eat such a ... Enjoy it, it's fragrant and sweet.
Drawn sweet potato: eat it now and cook it now! It'll be fun.
Sweet potatoes can be shredded and added with sugar. It is also good to fry them in oil until golden brown. You can also put some when mixing cold dishes.
There are also dried sweet potatoes, sweet potato porridge and so on.
But I'm not afraid to hear the old man say that eating too many sweet potatoes will lead to poisoning! You can detoxify by eating radish.
There is a local practice in Fuqing area ... which tastes delicious ... and its name is sweet potato king.
Sweet potato is the first of the top ten miscellaneous grains, so its nutritional value can be known without saying anything. Many people like it, and there are various ways to do it. If the way can be more special, that is to say, you can add a little ingredients, it must be more delicious.
Fried sweet potato and watermelon
Ingredients: sweet potato
Accessories: Cucurbita pepo and coriander leaves.
Seasoning: salt, onion, minced garlic, chicken essence and cooking oil.
Practice:
1. Wash and peel the sweet potato and cut it into hob blocks. Wash and peel the seeds of the pumpkin and cut it into hob blocks slightly smaller than the sweet potato.
2. Set fire to the pan and drain the oil. When the oil temperature is 40% hot, add minced garlic and shallots and stir-fry until fragrant. Pour in sweet potato pieces and stir-fry until it is 5% ripe, then add in pumpkin and stir-fry. Add appropriate amount of water, salt and chicken essence. When the soup is dried, sprinkle with fragrant leaves.
Features: salty and sweet, easy to operate.
Tip: Sweet potato is sweet and flat. It has the effects of invigorating the middle energizer and blood, benefiting qi and promoting fluid production, strengthening the spleen and stomach and widening the stomach. Sweet potato contains mucin, which has protective effect on cardiovascular system. Regular eating can reduce the content of plasma and cholesterol, and reduce subcutaneous fat, which has the effect of bodybuilding and longevity.
Fisherman sweet potato strips
Ingredients: sweet potato
Accessories: garlic, bread crumbs, green and red peppers.
Seasoning: salt, pepper, chicken essence and dried starch.
Cooking method:
1. Wash the sweet potato, peel it, cut it into a note, soak it in cold water to control the moisture, then evenly stick dry starch, cut the green and red pepper into strips, and fry the garlic and bread crumbs together for later use;
2. Ignition in a pan and pour in oil. When the oil temperature reaches 50%, fry the French fries thoroughly in the pan, and then fry them again. When they are crispy outside and cooked inside, add green and red peppers, remove them together and drain the oil. Stir-fry the garlic, bread crumbs and fried sweet potato strips in the pan, and add salt, pepper and chicken essence.
Features: beautiful, spicy and palatable.
Sweet potato pudding with milk flavor
Ingredients: fresh milk, sweet potato
Accessories: vanilla ice cream, mixed fruits and cherries.
Cooking method:
1, sweet potato diced into the pot, pour in a proper amount of fresh milk and cook for 20-30 minutes. After cooking until the viscosity is appropriate, add vanilla ice cream and stir well;
2. Cool the stirred milk porridge, put it in a cup and freeze it in the refrigerator. Take it out when eating, and put the mixed fruits and cherries on the frozen milk porridge.
Features: rich milk fragrance, sweet and sour.