Efficacy: Purple rice is rich in antioxidants, and the contents of vitamins and minerals are two or three times that of white rice. Regular consumption of yam can improve human immunity. Moreover, yam has the effect of strengthening the spleen and tonifying the kidney. Kidney is the innate foundation, and spleen is the digestion and absorption of human body, which is called the acquired foundation. Yam not only nourishes the nature, but also nourishes the day after tomorrow, and has the most special effect in foods with the same origin of medicine and food.