Stomach cancer is the second leading cause of cancer death in the world and one of the most common malignant tumors threatening human health. With the increasing improvement of living standard, people pay more and more attention to the prevention of stomach cancer. How to keep away from the threat of stomach cancer in daily life? Scientific diet is the key. The prevention of stomach cancer should start from scientific diet. The consensus of gastroenterologists is that people who regularly consume soybean and its products have low risk of stomach cancer. Soybean is not only rich in protein, but also contains protease inhibitors, which have cancer-inhibiting effects. Those who regularly consume animal foods such as fish, meat, eggs and milk have a much lower risk of stomach cancer. This is because they are rich in high-quality protein, which has an inhibitory effect on the synthesis of carcinogenic nitrosamines in the stomach. It should be noted that fresh fish, meat, eggs and other protein-rich foods must be consumed. Cooking fish and meat foods, braised and steamed is preferred, and pickled, smoked or sun-dried should not be consumed. Yellow and green vegetables are rich in! carotene, vitamin- and vitamins. Each person should maintain a daily intake of yellow and green vegetables half a pound to a pound, which has a preventive effect on stomach cancer. The trace element selenium has the effect of anti-oxygen free radical and prevention of stomach cancer and other cancers. Foods rich in selenium such as animal liver, seafood fish, shiitake mushroom, silver fungus, yellow flowering cabbage, etc. Patients with atrophic gastritis can take appropriate vitamin-, vitamin and group vitamins, and oral selenium yeast if available, which can achieve significant results. Many natural foods, such as garlic, kiwi, walnuts, lotus seeds, dried bamboo shoots, kelp, nori, etc., have anti-stomach cancer effects. Tea also has anti-stomach cancer effect, with green tea and flower tea being the best. Food should be diversified to maintain a balanced diet. Avoid high salt (the amount of salt should be limited to 1 gram per day), hard and overheated diet. Drinking strong alcohol can also damage the gastric mucosa and thus induce gastric cancer, so be careful to avoid it. Consume foods with protective effects appropriately. Choose to eat foods containing vitamins. Foods rich in vitamins, such as almonds, hazelnuts, peanuts and vegetable oils. Garlic can inhibit the growth of nitrate-reducing bacteria and molds in the stomach and should be promoted to eat more. Non-smoking can reduce the content of thiocyanate, the catalyst of nitrosation reaction, in the body, thus reducing the synthesis of “,nitroso compounds. Eat less or no carcinogens.” ! Nitro compounds and other carcinogens are factors that induce stomach cancer, people should eat less or no food related to them, such as pickled, smoked, baked, fried food and moldy food.