Pickled food: salted fish produces dimethyl nitrite, which can be converted into carcinogenic material dimethyl nitrite in the body. Salted eggs and salted vegetables also contain carcinogenic substances and should be eaten sparingly. 1.Barbeque food Roast beef, roast duck, roast lamb, roast goose, roast suckling pig, roast lamb skewers, etc., should not be eaten because they contain strong carcinogens. Smoked foods such as bacon, smoked liver, smoked fish, smoked eggs, smoked dried bean curd, etc. contain benzopyrene carcinogens and are prone to esophageal and stomach cancer when eaten regularly. 3.Fried food After frying, carcinogenic polycyclic aromatic hydrocarbons are produced. Oil pancake, stinky tofu, fried taro corner, doughnut, etc., as most of them use repeated oil, carcinogenic substances will be produced at high temperature. 4, moldy substances rice, wheat, beans, corn, peanuts and other foods are susceptible to moisture mold, contaminated by mold will produce carcinogenic toxin – aflatoxin. 5, overnight cooked cabbage and sauerkraut will produce nitrite, which will be converted into amine nitrite carcinogenic substances in the body. 6.Betel nut Chewing betel nut is a factor that causes oral cancer. 7. Repeatedly boiled water Repeatedly boiled water contains nitrite, which will generate carcinogenic amine nitrite after entering the body.