Don't eat sprouted purple potatoes. The germinated purple sweet potato is toxic, which leads to the decay of purple sweet potato and harms people's health. When purple sweet potato germinates, starch and sugar will be degraded into nutrients needed for germination. Purple potato will release some toxins in the process of degradation, which will lead to mildew and rot (due to the increase of starch decomposition moisture, it is easy to deteriorate). The germinated purple potato becomes soft and tastes bad.
Extended data
Sweet potato, also known as sweet potato, sweet potato, sweet potato, sweet potato and so on. , which is a favorite dual-purpose food for China people. Sweet potato is rich in nutrition, including starch, dietary fiber, carotene, vitamins A, B, C and E, and more than ten kinds of trace elements such as potassium, iron, copper, selenium and calcium. ?
According to records, sweet potato has many health functions. According to Compendium of Materia Medica, sweet potato has the effects of "tonifying deficiency and benefiting qi, strengthening spleen and stomach, and strengthening kidney yin". Modern scientific research has also confirmed that sweet potato helps to lose weight, relax bowels and inhibit cholesterol, thus helping to keep fit and delay aging.
Purple sweet potato is a new sweet potato variety with purple skin and purple flesh introduced from abroad in 1980s. At present, purple sweet potato varieties in China are all introduced from abroad and bred by domestic hybridization. In the market, the price of purple sweet potato is higher than that of ordinary sweet potato, so let's analyze whether it is worth the money.
Purple sweet potato basically contains all the nutrients of sweet potato, and is rich in protein, dietary fiber, vitamins and trace elements. After cultivating purple sweet potato in Japan, the differences between purple sweet potato and common sweet potato were compared. It was found that the contents of lysine, copper, manganese, potassium and zinc in purple sweet potato were 3-5 times that of common sweet potato, especially the contents of iodine and selenium were 20 times that of common varieties.
According to the analysis of American Agricultural Products Center, the nutritional value of purple sweet potato produced in the United States is much higher than that of other sweet potatoes, in which lysine, potassium, manganese and zinc are 5-8 times higher than that of ordinary sweet potatoes, while the content of iodine and selenium is more than 20 times higher than that of other sweet potatoes.
For China residents whose staple food is rice and flour, the rich lysine in purple sweet potato can supplement the lack of lysine in rice and flour. Therefore, eating purple potato with rice and flour can achieve the function of protein complementarity. ?
Purple sweet potato is purplish red because it is rich in anthocyanins, which is not comparable to ordinary sweet potatoes. Anthocyanin is also a powerful antioxidant, and its ability to scavenge free radicals is stronger than that of vitamin C and vitamin E. ..
It can not only indirectly eliminate excessive free radicals by improving the activity of animal antioxidant enzymes, but also directly eliminate free radicals by releasing electrons through redox.
The role of anthocyanins does not stop there. More and more studies show that anthocyanins in purple sweet potato can help to limit the development of some cancers and serious vascular diseases and reduce their incidence. In addition, anthocyanins also have the functions of enhancing memory, preventing aging, preventing diabetes and obesity, and improving optic nerve.
Another special advantage of purple sweet potato over common sweet potato is its rich selenium. Selenium is a component of glutathione peroxidase, which has a special contribution to scavenging free radicals in the body. Selenium is also an important factor in preventing cancer. ?
In terms of nutritional components, purple sweet potato is indeed richer than ordinary sweet potato, but compared with the price of ordinary sweet potato in the market, its cost performance remains to be discussed. After all, the nutrients our body needs can't be supplemented by eating a certain food.
Moreover, purple sweet potato, like ordinary sweet potato, contains oxidase, which easily produces a large amount of carbon dioxide gas in the gastrointestinal tract of human body, causing abdominal distension, burping and gas production. Eating a large amount at one time will also stimulate the secretion of gastric acid, resulting in a "heartburn" feeling. Therefore, even if purple potatoes are nutritious, you can't eat too much!
References:
People's Daily Online-Is germinated garlic more beneficial to heart health? The toxicity of the two foods after germination is the same as that of arsenic.