What is meant by a healthy diet of “red, yellow, green, white and black”? ”Red” is a day a tomato, tomatoes are rich in nutrients, nutritionists agree. It contains a variety of vitamins, especially the content of vitamin C is exceptionally rich, is the first choice of fruits and vegetables to prevent and fight cancer. Experts believe that tomatoes have cancer-preventing effects because the tomato heme, which turns tomatoes red, helps prevent cell damage. So there is a folk proverb that says: “tomatoes, good nutrition, beauty and young disease less.” What is “yellow”? Pumpkin, sweet potatoes, carrots, old corn, soybeans, etc. are called yellow vegetables. A special study in the United States showed that the consumption of yellow foods can reduce the incidence of tumors by 20 percent. Carotenoids play two important roles in health: one is to support our immune system, and the other is antioxidants, which neutralize free radicals that harm DNA and protect cells from damage. What does “green” mean? Green tea contains a kind of antioxidant effect of tea polyphenols, has the effect of anti-cancer and cancer prevention to prolong life. There is a proverb that says “white water to drink tea, can live more than 100.” ”White” refers to oat flour, oatmeal. Former British Prime Minister Margaret Thatcher high cholesterol, do not take drugs, she just eat oatmeal bread every morning. Kuomintang patriarch Chen Lifu more than 100 years old, every morning morning oatmeal porridge oatmeal porridge not only lower cholesterol, lower triglycerides, and diabetes, laxative, weight loss is particularly good. The “black” refers to black fungus. It is very good for regulating blood viscosity, anti-platelet aggregation, reduce blood viscosity. After eating black fungus, blood becomes thinner and less likely to get cerebral thrombosis and coronary heart disease. The reduction of blood viscosity has the same positive significance for the fight against cancer and cancer prevention.