Purple sweet potato detoxification laxative effect is better General sweet potato shoots tend to be green, but purple sweet potato shoots are purple. The starch content of purple sweet potatoes is about 20 percent higher than sweet potatoes, so the taste is more chewy. She Yibin said, purple sweet potato is purple mystery lies in the high content of cyanidin. The current market price is generally in the 2.5 yuan / catty, large food markets are generally sold. Nanjing combined hospital of Chinese and Western medicine dietary therapy health care expert Dr. Wang Dongxu said, purple sweet potato has edible, medicinal and health care in one of the characteristics. Sweet potatoes are known to promote the efficacy of defecation, the reason is that sweet potatoes contain a lot of crude fiber. And purple sweet potato contains crude fiber is richer, so the effect of defecation and detoxification is even better. Director Wang said, purple sweet potato in addition to the nutrients of ordinary sweet potatoes, but also rich in selenium and anthocyanins. Selenium is an essential trace element. Many of the secrets of longevity of the elderly in longevity areas are related to selenium. For example, as determined by the authorities, the soil in Rugao, Nantong, Jiangsu Province, is rich in the trace element selenium, and it is this soil that grows out of the vegetables and crops are also rich in selenium. Rugao's dried radish selenium content is several times that of ordinary dried radish, such as cabbage and other selenium content is also several times that of ordinary varieties, known as "longevity food", and the local people's dietary habits to miscellaneous grains and vegetables as the mainstay of the food chain to supplement the human body in the selenium, brought about by the longevity, selenium-rich foods, can improve the body's immune system, anti-aging. aging. Dr. Wang Dongxu said that anthocyanins have preventive and therapeutic effects on more than 100 kinds of diseases. Anthocyanins are known as the seventh essential nutrients after water, protein, fat, carbohydrates, vitamins and minerals. Anthocyanins are the most direct, effective and safe free radical scavenger discovered by the scientific community to prevent and treat diseases and maintain human health, and its ability to remove free radicals is 20 times that of vitamin C and 50 times that of vitamin E. Anthocyanins have a small molecular structure, and can be used to prevent and treat more than 100 kinds of diseases. Anthocyanin has a small molecular structure, is the only can through the blood-brain barrier to remove free radicals to protect brain cells. Since the purple sweet potato has so many benefits, then, how to eat both healthy and scientific? Director Wang said, processing purple sweet potato, must be steamed and boiled through. Because the cell membrane of starch in purple sweet potato is not destroyed by high temperature, it is difficult to digest. Furthermore, the gasification enzyme in sweet potato is not destroyed by high temperature, which will produce discomfort after eating. Since purple sweet potatoes are low in protein, eating them alone will result in unbalanced nutritional intake. Therefore, the traditional method of eating sweet potatoes cut into cubes and boiled with rice into porridge is still more scientific.