According to the latest statistics released by the National Tumor Registry in 2014 covering 145 registration sites and 160 million people nationwide, in 2010, the estimated number of new malignant tumor cases was about 3.09 million and 1.96 million deaths, with a national malignant tumor incidence rate of 235.23 per 100,000. The current epidemic situation of malignant tumors in China is that the common tumors in developing countries still exist, and the common tumors in developed countries are also gradually increasing, which is in the period of double burden of malignant tumor incidence. Simple and easy to implement “rainbow principle” helps to reduce the incidence of cancer in the U.S. Compared with China, the latest annual report of cancer in the U.S. shows that the incidence of cancer in the U.S. is on a decreasing trend. In fact, this result is inseparable from the efforts in cancer prevention, screening and behavioral interventions (including tobacco control and health education, etc.). Experts from Nutritional and Health Research Center introduced the American Cancer Society’s recommended cancer prevention diet, the “Rainbow Principles”, to improve lifestyles and effectively fight cancer by starting with diet and living. The “rainbow principle” divides fruits and vegetables into five colors: red, orange, yellow, green, purple, black and white, which helps people determine the phytonutrients contained in fruits and vegetables according to their colors, and clearly understand the colors of fruits and vegetables required by the human body daily and their health effects, so as to balance the diet and take in the nutrients required by the body. Experts from Nutrilite Nutrition and Health Research Center have listed the five colors of fruits and vegetables that represent the “rainbow principle” and the positive effects that each phytonutrient can play in tumor prevention and treatment. Red: Tomatoes. Lycopene is the main phytonutrient contained in tomatoes, and it is one of the most effective antioxidants in the plant world. Experiments have shown that regular consumption of tomatoes can effectively reduce the chance of prostate cancer, breast cancer and digestive tract cancer. Orange and yellow: corn. Corn is rich in carotenoids and gutta-percha glycopeptides, which are important nutrients in its fight against tumors. With the effect of selenium, glutathione is able to participate in the synthesis of glutathione peroxidase, which catalyzes the reduction of organic peroxidase and stops the production of free radicals, thus fighting against foreign carcinogens. Green: cabbage and spinach. Cabbage contains isothiocyanate, a sulfur-containing compound that can play a positive role in the prevention of tumors and cardiovascular diseases. Spinach is rich in folic acid, which acts as a coenzyme in the body, participating in the metabolic process of amino acids and nucleic acids, and can help reduce the incidence of certain tumors by maintaining the normalcy of DNA through various pathways. A large Swedish study called the Malmö Diet and Cancer (MDC) study found that adequate folate intake can significantly reduce the risk of breast cancer in middle-aged and older women. Earlier epidemiological studies have also confirmed that folic acid can help protect the body against the threat of rectal and colon cancers, as well as some cancers in other parts of the body. “Folic acid is one of the B vitamins commonly found in dark green vegetables, legumes, fruits and animal liver,” according to experts at Nutrilite Nutrition and Health Research, “The total folic acid intake needed to reduce breast cancer risk is not unattainable, and women can achieve it through diet and consumption of dietary supplements to achieve this.” Purple and black: sweet potatoes, eggplants, grapes. Sweet potatoes contain the chemical dehydroepiandrosterone, which is used to prevent colon and breast cancer; eggplant contains lobeline and cucurbitacin that have long been used in tumor control; and grapes are rich in resveratrol, which has powerful antioxidant properties and laboratory studies have shown that resveratrol is effective in blocking the cellular cancer process. White: garlic. Several studies have shown that the allicin contained in garlic can fight the threat of stomach cancer. While nitrates in food tend to act in the acidic environment of gastric juice to produce the powerful carcinogen nitrosamines, allicin in garlic inhibits the growth of nitrate-reducing bacteria, thus preventing the synthesis of nitrosamines and reducing the risk of gastric cancer. “In addition to this, nutrients with anti-cancer properties are widely available in the diet. Flavonoids, for example, which are derived from foods such as soy and soy isolates, citrus and citrus extracts, grape seeds, kudzu and nuts, can reduce the number of chemical-induced tumors, prevent carcinogen activation and increase the action of certain enzymes to promote excretion of carcinogens.” Experts from Nutrilite Nutrition and Health Research Center recommend people to take in a variety of nutrients through a reasonable diet, complemented by regular work and rest and moderate exercise, and stay away from unhealthy lifestyles to fight the threat of tumors. “Balanced diet and healthy life are the most effective anti-cancer drugs.”