Cancer is currently the greatest enemy of human health, and every year about 6 million people around the world lose their lives to cancer, of which about 1.3 million die of cancer in China. However, most cancers are preventable. The World Cancer Research Fund (WGRF) has been committed to basic, clinical and cancer prevention research for many years, summarizing the results of worldwide research in the field of cancer, and proposing 14 recommendations for cancer prevention from diet and health with a wide range of scientific basis. Diet to prevent cancer 14 tips: 1. Reasonable arrangement of diet. Plant foods such as vegetables, fruits, cereals and beans should account for more than 2/3 of the daily diet. 2.Control your weight to avoid being too light or too heavy. Weight gain should not exceed 5 kg in adulthood. With body mass number (BMI) = weight (kg) / height (m) 2 to measure, BMI less than 20, underweight; BMI20-25, for the ideal weight; BMI25-30, is slightly overweight; BMI greater than 30, seriously overweight. 3, adhere to physical exercise. If the work is rarely active or only light activities, every day should be about 1 hour of fast walking or similar amount of exercise. At least 1 hour of sweaty vigorous exercise every week. 4. Eat more vegetables and fruits. Eat 400-800 grams of fruits and vegetables every day, green leafy vegetables, carrots, potatoes and citrus fruits have the strongest anti-cancer effect. Eat more than five kinds of fruits and vegetables every day, and adhere to it all year round, in order to have a sustained anti-cancer effect. 5, eat 600-800 grams of various grains, beans, plant roots and stems every day, the less processed the food, the better. Eat less refined sugar. 6, do not advocate drinking alcohol. Even if you want to drink, men should not exceed two small cups a day, women should not exceed a small cup a day. 7. Eat no more than 90 grams of red meat (i.e., beef, lamb and pork) a day. It is best to eat fish and poultry to replace red meat. 8. Eat less high-fat food, especially animal fats. Choose proper vegetable oil and moderate the amount. 9. Eat less salt. Eat less pickled food and consume less than 6 grams (about one teaspoon) of salt per day. 10. Do not consume foods that have been stored at room temperature for too long and may be contaminated with fungal toxins. 11. Use refrigeration or other suitable methods to preserve perishable food. 12. Additives, contaminants and residues in food are safe if their levels are below the prescribed limits, but indiscriminate or improper use may affect health. 13. Do not eat burnt food, fish and meat grilled directly on the fire, and eat cured meat and smoked meat only occasionally. 14. For people whose diets basically follow the above recommendations, it is generally not necessary to consume nutritional supplements, which may not be helpful in reducing the risk of cancer.