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.
Purple sweet potato is purplish red because it is rich in anthocyanins, which is not comparable to ordinary sweet potato. 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.
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Edible taboo of purple sweet potato
First, avoid eating purple potato alone, and eat it with high-quality protein food for more comprehensive nutrition.
Second, avoid eating raw. Purple potatoes should be cooked thoroughly before eating, because starch granules are difficult to digest without high temperature damage.
Third, avoid eating with tomatoes. Tomatoes contain a lot of acid, which will form indigestible substances with purple potatoes in the stomach, which may easily lead to abdominal pain, diarrhea and indigestion.
Fourth, purple sweet potatoes should not be eaten with persimmons, which not only affects the absorption of nutrients, but also forms stones, which is easy to cause gastric bleeding.
5. Purple potato should not be eaten with liquor, crabs and bananas. Because of the low calorie of purple sweet potato, it is easy to cause abdominal pain and diarrhea.
Six, people who are allergic to purple potatoes should not eat. Purple sweet potato may also become an allergen. If you are allergic to purple potato, eating purple potato may cause allergic symptoms such as redness, frequent diarrhea, indigestion, headache, sore throat and asthma. Therefore, such people should also avoid eating purple potatoes.
People's Daily Online-No.480: Is purple potato really more nutritious than sweet potato?
People's Network-Check the efficacy and function of purple potato? Pay attention to these six taboos-