Actually, it’s because sweet potatoes are too difficult to grow there. Sweet potato starch is a home-cooked dish made from sweet potatoes. Sweet potato powder is a local specialty snack in Guangxi, Shaanxi, Hunan, Fujian, Sichuan, Guizhou and other places. Gray slender strips, crystal clear, similar to fans. Sweet potatoes are mainly distributed in Beijing, Shanxi, Shandong, Henan, Tianjin, Hebei, the three eastern provinces, Inner Mongolia, Yunnan, Sichuan, Hubei, Gansu, Anhui, Fujian, Shaanxi, Hunan, Guangdong, Jiangsu, Jiangxi and other places. The main production areas across the country are: Anhui Sixian (the hometown of Chinese potato), Hebei Lulong, Fujian Liancheng, Henan Kaifeng, Dengzhou, Shandong Sishui, Sichuan Nanchong and other regions. ?The main reason why Chongqing and Sichuan people like to eat sweet potatoes is:
Sweet potatoes are also called sweet potatoes, sweet potatoes, sweet potatoes, etc. Sweet potatoes contain a variety of nutrients that the human body needs. Each 500 grams of sweet potato can produce approximately 635 kcal of heat energy, containing 11.5 grams of protein, 14.5 grams of sugar, 1 gram of fat, 100 mg of phosphorus, 90 mg of calcium, 2 grams of iron, 0.5 mg of carotene, and vitamins B1, B2, C and niacin, linoleic acid, etc. Among them, the contents of vitamin B1 and B2 are 6 times and 3 times higher than that of rice respectively. In particular, sweet potatoes are rich in lysine, while rice and flour lack lysine. But many people don't realize it yet. Will eating sweet potatoes make people gain weight? According to scientific research, eating sweet potatoes will not make people gain weight. On the contrary, sweet potatoes are an ideal weight loss food. Its caloric content is very low, much lower than ordinary rice, so you don’t have to worry about gaining weight after eating it, but it can help lose weight. Sweet potatoes also contain a substance similar to estrogen, which has a certain effect on protecting human skin and delaying aging. Therefore, many foreign women regard sweet potatoes as a beauty food. Sweet potatoes are crispy and sweet when eaten raw and can replace fruits; sweet and soft when eaten cooked, they are sweet in the mouth and sweet in the heart. It can be used as both a staple food and a vegetable. There are many ways to eat it, including steaming, boiling, pan-frying, and deep-frying. Once cooked with skillful hands, it can also become a delicacy on the table.
1. Sweet potatoes have anti-cancer effects
The most anti-cancer nutrients in the diet are carotene (vitamin A precursor), vitamin C and folic acid. Sweet potatoes are rich in all three. A small sweet potato (about 2 pounds) can provide twice the daily amount of vitamin A required by the human body, one-third of the daily amount of vitamin C and about 50 micrograms of folic acid; the dietary fiber content is higher than that of a bowl of oatmeal. . -The antioxidant effects of carotene and vitamin C help resist oxidative stress damage to the genetic material deoxyribonucleic acid (DNA) and play a certain anti-cancer effect.
Eating sweet potatoes regularly helps maintain normal folic acid levels in the body. Low folic acid levels in the body can increase the risk of cancer. The high content of dietary fiber in sweet potatoes can promote gastrointestinal motility and prevent constipation and colorectal cancer.
2. Edible fiber
White sweet potato contains 10 times the fiber of rice noodles. Its texture is fine and does not harm the stomach. It can speed up the peristalsis of the digestive tract, help defecation and clean up. Digestive tract, shorten the residence time of toxic substances in food in the intestine, reduce the body's own poisoning caused by constipation, reduce the concentration of intestinal carcinogens, and prevent hemorrhoids and colorectal cancer. At the same time, cellulose can absorb part of the glucose, reducing the sugar content in the blood and helping to prevent diabetes.
3. Sweet potatoes prevent emphysema
An animal experiment at the University of Kansas in the United States found that smoking rats had lower levels of vitamin A and were prone to emphysema; The incidence of emphysema was significantly reduced in smoking rats fed foods containing vitamin A. Why some long-term smokers live to be over 90 years old without developing emphysema may be related to the fact that their daily diet is rich in vitamin A. Researchers recommend that those who smoke or passive smoke should eat some vitamin A-rich foods such as sweet potatoes every day to prevent emphysema.
Sweet potatoes are not only a healthy food, but also a good medicine for curing diseases. "Compendium of Materia Medica" records that sweet potatoes have the effects of "tonifying deficiency, replenishing qi and strength, strengthening the spleen and stomach, and strengthening kidney yin". "Sweet potatoes are steamed, cut, sun-dried, harvested, and used as food, called potato grains, which can make people live longer and less sick." "Supplementary Materials of Compendium of Materia Medica" says that sweet potatoes can nourish the heart, harmonize the blood, warm the stomach, and fatten the five internal organs. "Jinshu Zhuanxilu" says that it has 6 medicinal values: treating dysentery and diarrhea; treating alcoholism and heat diarrhea; treating dampness and heat and jaundice; treating spermatorrhea and white turbidity; treating blood deficiency and menstrual disorders; treating malnutrition in children .
"Lu Chuan Materia Medica" says that sweet potatoes can produce fluid and quench thirst, and can cure thirst caused by fever.