Purple sweet potatoes have no pigment. Purple sweet potatoes contain anthocyanins, which are natural pigments that make them purple.

The flesh of purple sweet potato is purple to deep purple, which makes many people doubt whether it is a genetically modified food. In fact, the purple color of purple sweet potatoes is neither genetically modified nor dyed, but comes from naturally occurring anthocyanins.

Purple sweet potato is also called black potato. Its flesh is purple to deep purple. It is rich in protein, 18 kinds of amino acids that are easily digested and absorbed by the human body, 8 kinds of vitamins including vitamins A, B, C and phosphorus. , iron and more than 10 natural mineral elements. It is an essential element for the human body to resist fatigue and replenish blood. Like sweet potatoes, purple potatoes are also rich in fiber, which can promote detoxification, improve the digestive tract environment, and prevent gastrointestinal diseases.

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It should be noted that purple sweet potatoes contain more carbohydrates, so it is best not to consume more than 200 grams each time.

Japanese scholar Suda Ikuo and others compared the free radical scavenging effects of different flesh-colored sweet potatoes and found that compared with white, yellow, and orange-fleshed sweet potatoes, purple potatoes have the strongest ability, and it is precisely the cyanine in them. Elements played an important role. ?

Research has found that the anthocyanins in purple sweet potatoes can change the microbial composition in the large intestine and significantly increase the number of "good bacteria" such as Bifidobacterium, Lactobacillus, and Enterococcus in the intestine. Researchers believe that eating purple potatoes rich in anthocyanins may be beneficial to the intestinal microbial environment and human health.

When it comes to the protective effect of anthocyanins on vision, people can easily think of blueberries. Researchers found that anthocyanins in purple sweet potatoes also promote the growth of retinal pigment epithelial cells, suggesting that it may also have a potential role in protecting vision. Moreover, whether in terms of price or anthocyanin content, purple sweet potatoes are cost-effective and a good choice. ?

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