Diet and nutrition are the material basis for life support and health maintenance, and to a large extent, diet has an important influence on the function and status of the body. It is generally believed that 75-90% of tumors are caused by environmental factors, because the environment can affect the quality and quantity of food and nutrients, and in turn can cause or inhibit the occurrence of cancer. The transformation of normal cells into tumor cells is often preceded by abnormalities in nucleic acid metabolism, i.e., mutations in genetic material, and is often preceded by profound changes in anabolic patterns, due to precisely regulated metabolic actions related to the function being differentiated, which are specific to normal cells, and must include the continuous synthesis of nucleic acids, enzymes, proteins, and other substances more specifically involved in cell growth and division. Whether it is enzymes, proteins, or intermediate products of the synthesis process, nutrients are involved. Therefore, this metabolic effect is closely related to dietary nutrition, which has been confirmed by animal experiments, clinical observations and epidemiological surveys; more than 50% of cancer mortality in women and more than 30% of cancer mortality in men may be related to nutrients. In the United States, 60% of women’s cancers and 40% of men’s cancers have food-related causes. In China, tumors directly related to diet include stomach cancer, esophageal cancer, liver cancer, intestinal cancer and breast cancer, and the mortality rate of the above cancers accounts for about 45% of all malignant tumors. Tumor patients need to pay attention to the following: 1. maintain optimistic mood and build up strong confidence to overcome cancer; 2. proper exercise can make the qi and blood flow smoothly and enhance the resistance of the body. Avoid wind and cold, “all diseases start from cold”, when the body is stimulated by wind and cold, the resistance will be reduced and the disease will be easily triggered; 3. Eat more vegetables (such as cabbage and cauliflower) and radish, sour plum, soybean, beef, mushroom, asparagus, coix seeds, etc. Food containing anti-cancer substances, fruits, milk, snapper, etc. are rich in many kinds of amino acids, vitamins, proteins and easily digestible tonic foods; 4. Eat less warm and tonic foods such as dog meat and mutton; 7. Eat less seafood without shell, bamboo shoots, taro and other allergic “hairy” products; 8. Eat less drinks and snacks containing chemicals, preservatives and additives; 9.