There are five elements in heaven and earth, and people have five internal organs, and the five internal organs also cooperate with the five elements. In fact, the five elements not only represent the five familiar substances of gold, wood, water, fire and earth, but also represent our internal organs: heart, liver, spleen, lung and kidney. At the same time, five colors can be derived: white, blue, black, red and yellow. As long as every meal absorbs five-color food, the five elements can coexist and the five internal organs can be reconciled, thus nourishing the body's function. Red food includes carrots, tomatoes and sweet potatoes. According to the theory of five elements of Chinese medicine, red is fire, so red food can enter the heart and blood after entering the human body, which has the functions of benefiting qi and enriching blood, generating blood and generating lymph.

Moreover, red food has strong antioxidant capacity and is rich in lycopene and tannic acid. It can protect cells and has anti-inflammatory effect. It can also provide protein, inorganic salts, vitamins and trace elements for human body, and enhance the functions of heart and qi and blood. Black food refers to natural animals and plants with various colors of black or purple and dark brown. Among the five elements, black dominates water and enters the kidney. Therefore, eating black food often can tonify the kidney. Black sesame, black fungus, laver, etc. It has high nutritional, health care and medicinal value, can obviously reduce the incidence of arteriosclerosis, coronary heart disease, stroke and other diseases, and has good curative effects on influenza, chronic hepatitis, nephropathy, anemia, alopecia and so on.