How to eat and nourish is always an important question for the family members of tumor patients, and it is also a question I am often asked in the clinic. Generally speaking, we suggest patients to eat soft and easily digestible food, and avoid spicy food as much as possible. Different patients should adjust their diets according to their tumor types, stages, physical conditions and seasons. The following are 15 international rules for cancer prevention, which will be of certain guidance for tumor patients and their family members’ diet. International Cancer Prevention Code 15 1. Maintain proper weight and avoid being too light and too heavy. 3. Exercise regularly and appropriately. 4. Eat more vegetables and fruits. 5. Eat more cereals, beans and root vegetables. 6. 9, eat less salt, adults take less than 6 grams of salt per day. 10, eat more raw food, less canned food. 11, food to ensure fresh, food should be frozen, refrigerated preservation, food should not be hidden for a long time. 12, pay attention to food safety. 13, cooking methods to science, do not eat burnt food. 14, eat less nutrients, supplements. 15, quit smoking.