Colorectal cancer is one of the most common malignant tumors, including colon cancer, rectal cancer and anal canal cancer, which originates from the epithelial tissue of the large intestine. How to prevent colorectal cancer in life? How to prevent colorectal cancer in life? With the influence of people’s lifestyle changes and other factors, the average annual number of new colorectal cancer cases in China reaches 130,000 and keeps climbing with an average annual increase of 4%. The latest statistics show that the proportion of colorectal cancer among young people in their 40s accounts for about 20% of the total number of colorectal cancer cases. China has entered the ranks of areas with a high incidence of colorectal cancer. Many cancers emphasize the need to be alert to the ‘disease from the mouth’, like liver cancer, stomach cancer, etc., which are inseparable from the high risk factors in life, such as drinking, smoking and uncontrolled diet. Since the intestine is the route through which food must pass, colorectal cancer is also considered a disease closely related to lifestyle, in which dietary factors play an important role. The most important thing to prevent colorectal cancer is to change the high-fat, high-protein, low-fiber diet and early detection of pre-cancerous lesions such as colorectal adenomas to interrupt the cancer process through active intervention. For people at high risk of colorectal cancer, regular colonoscopy should be performed. Normal work and rest is also another major life factor that is closely related to the chance of cancer. Other bad habits such as sedentary, lack of exercise; smoking and alcohol abuse, eating too much pickled food, etc. are all cancer-causing factors. “It is evident that cultivating a healthy lifestyle is an important asset to prevent colorectal cancer.” Giving oral calcium supplements to people with a family history of colon and rectal cancer and a high tendency to develop colon and rectal cancer can lead to a decrease in cancer incidence. Chemoprevention The most commonly used drugs for chemoprevention are vitamin ae and beta-carotene, as well as 4-hpr, and high doses of vitamin C are also commonly used to prevent polyp formation.