Black rice and purple rice are precious varieties in rice, both belong to glutinous rice, and their nutritional components are basically the same. Rice porridge boiled with black rice or purple rice is fragrant, shiny, soft and delicious. Because of its rich nutrition and good nourishing effect, it is called "blood-enriching rice" and "longevity rice". There is a folk saying in our country that "everything must be supplemented."

The protein content of black rice is 0.5 ~ 1 times that of rice, and inorganic salts such as manganese, zinc and copper are mostly 1 ~ 3 times that of rice, and it also contains special components such as vitamin C, chlorophyll, anthocyanin, carotene and cardiac glycoside that rice lacks, so black rice is more nutritious than ordinary rice. Eating more black rice has the functions of appetizing, invigorating the spleen, warming the liver, improving eyesight, promoting blood circulation, smoothing qi and replenishing essence, and has a good nourishing effect on juvenile gray hair, women's postpartum physical weakness, post-illness physical weakness, anemia and kidney deficiency.