According to the tumor prevention measures recommended by European tumor research center and national tumor experts in the United States, Japan and Italy, that is, 30 tumor prevention suggestions, if you can treat them seriously, you can greatly reduce the possibility of tumor. 1. Do not be partial to food and pay attention to balanced nutrition. 2. Try not to eat the same kind of food repeatedly. 3.Avoid overfeeding. 4.Do not smoke. Those who cannot quit smoking at one time should try to smoke less, and change to smoke less harmful cigarettes. 5, do not drink or drink less strong alcohol. Wine and beer should also be moderated. 6, often eat containing vitamin A, C, E and fiber food. Vc daily intake of at least 60 mg, Ve daily at least l0 mg. 7, consumption of cabbage, cauliflower and other yellow-green vegetables, not less than twice a week. 8, vegetables and fruits should be washed and eaten. 9, daily intake of trace elements of selenium 0.02-0.05 mg, which is present in foods such as milk, meat, eggs, bran. 10.Eat less greasy food. 11, eat less cholesterol-rich foods. 12.Eat less meat products processed with nitrates and nitrites, such as sausages, etc.