Gutian Meng (natural grain food advocate) Answer:

Purple sweet potato is a new variety of sweet potato with purple-black skin and purple-red flesh, which was introduced from abroad in the 1980s. At present, China's purple potato varieties have been introduced from abroad, there are also domestic hybrid cultivation.

Purple potato basically contains sweet potato all the nutrients, rich in protein, dietary fiber, vitamins, and trace elements. After Japan bred purple potato, compared the difference between purple potato and common sweet potato, found that lysine, copper, manganese, potassium, zinc in purple potato is 3-5 times that of common sweet potato, especially iodine and selenium content, is 20 times that of common varieties.

According to the analysis of the U.S. Agricultural Products Center, the nutritional value of purple potatoes produced in the U.S. is also much higher than that of other potatoes, in which lysine, potassium, manganese, zinc is 5-8 times higher than that of the ordinary sweet potatoes, while the content of iodine and selenium is more than 20 times higher than that of other sweet potatoes.

For the rice and noodles as the main food for our residents, purple potatoes in the rich lysine can supplement the rice and noodles in the lack of lysine, therefore, purple potatoes and rice and noodles with food can achieve the role of protein complementary.

The above content is answered by the natural cereal food - Valley Field Dreams, I hope to help you.