Purple potato rice is not dyed or natural. Purple sweet potato rice is a kind of rice-shaped food, which is made by shelling the whole grain, retaining all the nutritional components of the grain seeds, and mixing and extruding purple sweet potatoes according to a certain proportion. Is purple sweet potato rice dyed or natural: the skin and meat of purple sweet potato rice are purple, and its selenium and purple pigment are several times higher than that of ordinary sweet potato, containing 20% of protein, and containing vitamins, phosphorus, iron, calcium and other trace elements 10. Purple sweet potato belongs to the genus Ipomoea of Convolvulaceae, and its pulp is purple to deep purple, so it is also called black sweet potato, purple sweet potato or purple sweet potato. Purple sweet potato is a special variety of sweet potato. Purple sweet potato contains 10 mineral elements such as selenium and zinc, 18 amino acids, 8 vitamins such as vitamins C, B and A, especially anthocyanins, which have great medicinal value.