1, aflatoxin aflatoxin is one of the strongest chemical carcinogens found so far. It mainly causes liver cancer, and can also induce bone cancer, kidney cancer, rectal cancer, breast cancer and ovarian cancer. Aflatoxin mainly exists in grains, oils and their products contaminated by aflatoxin. For example, aflatoxin is most common in peanuts, peanut oil, corn, rice and cottonseed, and it is also found in dried fruits such as walnuts, almonds, hazelnuts and dried peppers, in animal foods such as liver and salted fish, and in milk and dairy products.
2.N- nitroso compound N- nitroso compound is a strong carcinogen to animals. Of the more than 65,438+000 nitroso compounds tested, more than 80 have carcinogenic effects. Excessive N- nitroso compounds in food are synthesized during food storage or in human body. The content of N- nitroso compounds in natural food is very small (safe for human body). At present, it is found that foods containing more N- nitroso compounds include smoked fish, pickled fish, bacon, ham and pickled sauerkraut.
3. Polycyclic aromatic compounds Polycyclic aromatic compounds are mostly found in coal tar, wood tar and asphalt.