Research data show that not all cancers are closely related to diet, but some cancers may be related to diet, or even have a clear causal relationship. 1.Esophageal cancer is related to the following dietary factors ① People who drink alcohol and smoke have a greater chance of developing esophageal cancer. ② The areas with low content of molybdenum, a trace element in food, have high incidence of esophageal cancer. ③ Insufficient intake of fresh green leafy vegetables and fruits in the diet leads to the deficiency of vitamin A and vitamin C, and the incidence of esophageal cancer is high. ④ Residents in areas where wheat and corn are the main food and the intake of zinc, magnesium and niacin is low are prone to esophageal cancer. ⑤ Often eat pickles and moldy food, consume more nitrosamine carcinogens, which induce esophageal cancer. ⑥ People who have the habit of drinking hot rice, hot tea and hot coffee are prone to esophageal cancer. 2. Stomach cancer ①People who like to eat smoked food are prone to stomach cancer. ② often eat pickled vegetables and dry salted fish can induce stomach cancer, may be these foods contain more nitrite and nitrite. ③ Residents with less intake of vegetables and fruits containing vitamin C have a high incidence of stomach cancer. ④ Drinking two glasses of milk every day can prevent the occurrence of stomach cancer. Colon Cancer and Rectal Cancer ① Low intake of dietary fiber. Fiber-rich foods are: whole grains, beans, vegetables, fruits, cabbage is especially obvious in the prevention of colorectal cancer. ② People who consume a lot of animal fat (mainly beef and mutton fat) are prone to colorectal cancer. ③Much cholesterol intake through various meats, eggs, may be related to the occurrence of colon cancer. ④ People who often drink beer or other alcoholic beverages have a high incidence of colon cancer. Colon cancer and rectal cancer occur more often at the age of 40 or above. 4, liver cancer ①Eating moldy food, food is often contaminated by mold, and produce mycotoxins (such as aflatoxin) that have carcinogenic effect. The most vulnerable food contaminated by mycotoxin are peanuts, corn, rice, sorghum and peanut oil. ② Consumption of plants containing carcinogenic toxins. Such as: thujaplicin-containing thujaplicin nuts, camphor tea in the camphor. ③ A large amount of alcohol consumption can cause cirrhosis of the liver, and eventually develop into liver cancer. Hepatitis B hepatitis B people at the same time exposure to aflatoxin is more likely to occur liver cancer. 5, breast cancer ① high fat intake of women susceptible to breast cancer, these fats mainly from beef, lamb and other meat. ② Excessive obesity, high incidence of breast cancer. The cause of obesity is complex, but one of the main reasons for excessive intake. ③ Low fiber intake reduces the excretion of estrogen from the feces. Blood estrogen content increases, and estrogen has the role of inducing breast cancer. 6.Lung cancer Low intake of dark green and yellow vegetables and fruits is the main dietary factor. These vegetables and fruits are rich in vitamin A source-beta carotene. Smoking is an important cause of lung cancer, and most people who have lung cancer caused by smoking are those who have insufficient intake of vitamin A (including β-carotene) at the same time. 7, bladder cancer ① and lung cancer research data, vitamin A intake is insufficient and bladder cancer. ② Intake of saccharin, coffee and fern may induce bladder cancer, but the evidence is not conclusive.