Cancer is a chronic disease and the number of cancer patients is increasing year by year, with <25 million survivors worldwide in 2002 and up to 70 million by 2050. The theme of 2012 National Cancer Awareness Week is "Science Against Cancer, Focus on Life - Diet and Cancer". According to the World Health Organization, 30% of cancers are directly related to diet. What should be eaten, how to eat, how much to eat and whether to avoid eating are topics of great interest to cancer patients and their families. There are various causes of tumors, including: environmental, social, spiritual and dietary aspects, and about 60% of cancers are related to diet. Oncologists recognize that fats, proteins, vitamins, dietary fiber and micronutrients, which are related to human nutrition, are closely related to the development of tumors. A multi-million dollar study by the American Institute for Cancer Research has confirmed that one and more substances from fruits and vegetables can be found at almost every stage of cancer development to slow, or even reverse, the malignant progression of tumors. High risk factors for cancer include: high body mass index, low fruit and vegetable intake, lack of exercise, smoking, alcohol abuse, low fruit and vegetable intake can lead to cardiovascular disease, cancer, gastrointestinal related diseases; healthy lifestyle is to maintain normal weight, balanced diet, regular exercise, quit smoking and appropriate alcohol consumption. Bad eating habits include: 1. Excessive calorie intake leading to body obesity is one of the main causes of colorectal cancer, esophageal cancer, pancreatic cancer, breast cancer (postmenopausal), endometrial cancer and kidney cancer; 2. Red meat and processed meat products are the causes of colorectal cancer, so if you eat meat, the intake of red meat should be less than 80 grams per day; processed meat products should be avoided completely; 3. Eating burnt Food, meat, fish and bacon directly grilled on an open fire can lead to liver cancer, etc.; 4. moldy cereals and beans, such food is easily contaminated with mycotoxins, which is a sufficient cause of liver cancer; 5. alcoholic beverages are one of the causes of oral cancer, throat cancer, esophageal cancer, colorectal cancer, liver cancer and breast cancer, if drinking alcohol, no more than two servings per day for men and no more than one for women (one One "serving" of alcohol contains about 10 to 15 grams of alcohol). Good eating habits include: 1. Eating at least 400 grams of different kinds of non-starchy vegetables and fruits daily can reduce the risk of oral, pharyngeal, laryngeal, esophageal, lung and stomach cancers; 2. Eating less pickled foods and reducing the salt used in cooking can reduce the risk of stomach cancer; 3. Cooking meat and fish at lower temperatures; 4. Avoiding foods with high energy density and sugary drinks with the aim of control weight; 5. Cancer prevention methods: eat more vitamin-rich foods, including vitamin C, vitamin A and vitamin E. The main foods are lemon, tomatoes, oranges, leafy vegetables, carrots and milk and eggs, etc. Summarized 10 more 10 less: in the diet, insist on eating less and more meals, less hot and more warm, less hard and more soft, less salt and more light, less sugar and more honey, less wine and more tea, less stale and more fresh, less meat and more vegetarian, less fried and more stewed, less smoked and more fried.