Sweet potato is a healthy food. Experts from Japan Cancer Prevention Institute have studied the relationship between diet and cancer of 260,000 people, which proves that vegetables have anti-cancer effect. Then, by analyzing the anti-cancer components of more than 40 kinds of vegetables and the experimental results of inhibiting cancer cells, they arranged 20 kinds of vegetables that could significantly inhibit cancer cells from high to low. Among them, sweet potato ranks first. Sweet potato contains universal anticancer components. In nature, vitamin A, vitamin C, vitamin E, vitamin D, mineral selenium, calcium, iodine, zinc, molybdenum, food cellulose, etc. all have certain anticancer or anticancer effects, especially vitamin A and vitamin C, which are almost omnipotent anticancer components. The anticancer effect of sweet potato lies in its various components.
Sweet potato is rich in carotene, mainly β-carotene, which is a free radical scavenger. Carotene is converted into vitamin A in the body. Rich carotene can promote the normal maturation of epithelial cells, inhibit the abnormal differentiation of epithelial cells and eliminate oxygen free radicals with carcinogenic effect. Sweet potato is also rich in vitamin C, which can be compared with citrus. Vitamin C is a highly active antioxidant, which can also scavenge free radicals and eliminate cancer cells.
Sweet potato contains a lot of cellulose. In addition to the above two anti-cancer vitamins, sweet potato also contains a lot of cellulose. Cellulose is not absorbed in the intestine, but it can absorb a lot of water and increase the volume of feces. This can dilute the fat concentration and reduce the harm of carcinogens to people. At the same time, cellulose can also promote intestinal peristalsis, reduce the retention time of feces in the intestine, reduce the contact between carcinogens and intestinal mucosa, and prevent colon cancer and rectal cancer.
Studies have confirmed that the lack of dietary fiber with laxative effect can induce various lifestyle diseases and colorectal cancer. However, after the sweet potato is cooked, some starch changes, which can increase the dietary fiber by about 40% compared with raw food. The increase of various water-insoluble fibers can effectively stimulate the intestine and promote defecation. This is also the reason why cooked sweet potatoes are more anticancer than raw sweet potatoes.
DHEA in sweet potato can also prevent cancer early 1982. Professor Arthur Schnitz of philadelphia university, USA, isolated a chemical called DHEA from sweet potato. After injecting it into mice inoculated with cancer cells, it can prevent mice from suffering from colon cancer and breast cancer and prolong their life. 1995, American biologists confirmed that this substance called "dehydroepiandrosterone" can be used to prevent colon cancer and breast cancer.
Sweet potato is a standard low-fat food. Epidemiology has proved that high-fat diet is closely related to the occurrence of cancer. Some experts have found that the high incidence of cancer is related to excessive fat in food. These cancers mainly include colon cancer, rectal cancer, breast cancer, pancreatic cancer, bladder cancer and gallbladder cancer. Sweet potato is a standard low-fat food with only 0.2% fat.
It can be seen that sweet potato is rich in anticancer substances but almost contains no carcinogenic factors. No wonder it is called "the most anticancer food". But even if sweet potatoes are no matter how good, they should be eaten in moderation, and dietary balance is still a big principle.
Sweet potato: Eat detox early and lose weight late. Sweet potato is a famous detoxification star. It is sweet and warm, and its glycoside composition has the same effect as dietary fiber, which can enhance intestinal peristalsis.
Eating sweet potatoes in the morning can detoxify. It is suggested that the breakfast staple food should be served with sweet potato, which has a better detoxification effect, which is not only conducive to smooth defecation in one day, but also rare. Sweet potato is rich in lysine, which is a nutrient lacking in rice and flour. Mixed eating can play a complementary role in protein, with higher utilization rate of nutrients and greatly improved nutritional value.
Meanwhile, sweet potato is an alkaline staple food. Eating a lot of acidic foods such as rice, meat and eggs in the morning can neutralize the lunch and dinner of the previous day, ensuring the acid-base balance of the human body and fighting fatigue, and the effect is also very good.
Some people like to completely replace staple foods such as rice or flour with sweet potatoes, which is actually not desirable. Because sweet potato contains oxidase and crude fiber, it will produce gas in the stomach and intestines, and there will be symptoms such as bloating.
Sweet potato promotes weight loss at night. Sweet potato is rich in starch, which can not only provide calories, but also be super full (you will feel full if you eat a little), and it is a low-fat and high-fiber food, which is most suitable for dieters.
Among them, sweet potato contains carotene, which can keep skin healthy and enhance resistance. Moreover, purple sweet potato contains higher carotene than yellow sweet potato.
According to the food calorie standard published by China Nutrition Association, a medium-sized sweet potato (about 10 cm) contains about 100 calories, which is equivalent to half a bowl of rice. Liang suggested that if these snacks are eaten as a meal, you should avoid eating other starchy foods. People who lose weight eat less calories, and they have a chance to lose weight.
Eat sweet potatoes at special times. Many women experience depression, nervousness, emotional fragility, irritability and fatigue before menstruation. The main reason is the decrease of serotonin in the brain. If you want to increase serotonin, you must increase the concentration of tryptophan in your brain. The best way is to get the "happiness factor" from your diet.
Therefore, female friends eat more sweet potatoes and other potato foods in "extraordinary times", which helps to eliminate bad emotions. They are rich in carbohydrates, which can stimulate insulin secretion after eating, and insulin can promote tryptophan to enter the brain. In addition, potatoes are also rich in vitamins, and vitamins, especially vitamin B6, can help the synthesis of serotonin in the brain.