In particular, viral hepatitis is closely related to the development of liver cancer, and is called the “catalyst” of liver cancer by the medical profession, among which hepatitis B (HBV) and hepatitis C (HCV) are the most important ones. Therefore, hepatitis B virus and hepatitis C virus are regarded as one of the cancer-promoting factors, which are the causes of liver cancer. Long-term consumption of pickled, fried and smoked foods can also induce liver cancer: nitrosamines in pickled foods and 3,4-benzopyrene in fried and smoked foods can induce cancer, so we should minimize the consumption of pickled, fried and smoked foods such as cured meat, grilled meat, grilled sausage, salted fish and pickled vegetables in our daily life. Consumption of spoiled foods can also induce liver cancer: Studies have found that moldy foods produce a toxic metabolite, aflatoxin, which is the most powerful biological carcinogen found today.