It is appropriate to eat more often foods rich in vitamin A, B, C, E, folic acid, carotene. It is appropriate to eat more coarse grains and soybean products that are rich in trace elements. It is advisable to eat high-quality protein foods to enhance the immunity of the body, such as lean meat, eggs, milk, fresh fish and soybean products, in addition, it is also advisable to eat foods rich in fiber, which can significantly reduce the incidence of colon cancer. Avoid eating high-fat food, high-fat diet increases anaerobic bacteria in the intestine, food residues remain in the intestine for a long time, stimulating the intestinal wall, which can easily promote colon cancer and rectal cancer; avoid eating pickled and smoked food. Pickled food contains nitrate and nitrite, avoid eating fried and baked food, because fried and baked burnt food contains carcinogenic polycyclic aromatic hydrocarbon compounds. Avoid eating too hot or too spicy food and strong wine, strong tea and cigarettes, but also avoid eating foods containing preservatives, coloring agents, bleaching agents, etc. It is advisable to eat items with the effect of softening hardness, resolving phlegm and dispersing knots; the pathogenesis of cancer is mostly related to blood stagnation and blood stasis, so it is advisable to take items with the effect of activating blood stasis and eliminating stagnation; it is advisable to eat items with the effect of clearing heat and detoxifying toxins. It is advisable to eat food with the function of nourishing Yin and tonifying Qi, nourishing and strengthening the body. Avoid eating spicy and stimulating, fragrant, dry and warm to folk circulation of rooster, carp, pig’s head meat, shrimp, crab, toon head, old goose, dog meat, sea fish and other hairy items. Desirable food corn, rice bran, sweet potatoes, coix seeds, pumpkin, soybeans, white lentils, broad beans, pig liver, oyster chicken, eggs, goose blood, pig’s feet, sour milk, milk, sea cucumber, snapper, dried scallops, clams, oyster meat, abalone, shark, pear, kiwi, apricot, hawthorn, orange, jujube, banana, strawberry, fig, apple, Luo Han Guo, rhizome, lily, walnut, water chestnut, taro, lotus seeds Ficus, sunflower seeds, bitter gourd, winter melon, cucumber, garlic, leek, tomato, lycopodium, carrot, Ulva, golden needle, lettuce, asparagus, potato, tofu, kale, yam, cut bean, soybean sprout, wheat bran, strawberry, kelp, nori, seaweed, black fungus, white fungus, monkey head mushroom, golden needle mushroom, straw mushroom, flat mushroom, shiitake mushroom, reishi, bee’s milk, balsamic vinegar, wolfberry, white poria, purple river carp. Cordyceps sinensis, loofah, melon, amaranth, bok choy, coronary, chrysanthemum brain, celery, wild rice, mulberry, olive, loquat, orange cake, prune, grape, apple, ground ear, lamb’s quarters, mackerel, crucian carp, silverfish, mussel, snail, pig’s blood, pig’s liver, pork loin, chicken gizzard, quail egg, duck, ginseng, astragalus, American ginseng, bird’s nest, etc. Avoid eating high-fat diet, pickled and smoked food, fried and baked burnt food, spicy and irritating food, moldy food, tobacco and alcohol, some folk still keep the traditional custom of avoiding eating old goose meat, rooster, pig’s head meat, old female pork, mutton, dog meat, shrimp, crab, sea fish, carp, toon head, eggplant and other hairy things.