1, pickled food: salted fish produces dimethyl nitrite, which can be converted into carcinogenic substances in the body dimethyl nitrite. Salted eggs, pickled vegetables, etc. also contain carcinogenic substances and should be eaten sparingly. 2, barbecue 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. 3.Smoked foods: such as bacon, smoked liver, smoked fish, smoked eggs, smoked dried tofu, etc. contain benzopyrene carcinogens and are prone to esophageal cancer and stomach cancer when eaten frequently. 4.Fried food: after frying, carcinogenic polycyclic aromatic hydrocarbons are produced. When coffee is burnt, benzopyrene will increase 20 times. Oil pancake, stinky tofu, fried taro corner, doughnut, etc., as most of them use repeated oil, carcinogenic substances will be produced under high temperature. 5, moldy substances: rice, wheat, beans, corn, peanuts and other foods are susceptible to moisture mold, contaminated by mold will produce carcinogenic toxins – aflatoxin. 6, overnight cooked cabbage and sauerkraut: will produce nitrite, which will be converted into carcinogenic amines nitrite in the body. 7.Betel nut: chewing betel nut is a factor that causes oral cancer. 8.Repeatedly boiled water: repeatedly boiled water contains nitrite, which will generate carcinogenic amine nitrite after entering the body.