Recently, many surveys have shown that the incidence of colorectal cancer is quietly increasing along with the changes in people’s lifestyles. Among the many influencing factors, diet plays an important role. Evidence shows that about 40% of cancer patients are triggered by improper diet, which includes colorectal cancer. Poor diet is characterized by excessive intake of sugar, animal fats and cholesterol, a significant lack of dietary fiber and vitamins, and low physical activity that accompanies high calorie intake. Maintaining Ideal Body Weight: The First Step to Prevent Colorectal Cancer Everyone has an ideal body weight, but not everyone can achieve and maintain it. Research has shown that overweight and obesity are the “foundation” of many diseases, including colorectal cancer. Therefore, the first step in preventing colorectal cancer is to achieve and maintain your ideal weight. Suggestions: 1. Avoid excessive intake of high sugar and high fat foods, such as cream cakes, chocolates, fried foods, desserts, sweet drinks, etc.; 2. Avoid excessive drinking of alcohol, especially strong alcohol; 3. Maintain an appropriate amount of physical activity every day. Animal fat: the “culprit” of colorectal cancer A diet high in animal fat is a high risk factor for colorectal cancer. The reasons may include: (1) Many carcinogens are fat-soluble, which can be dissolved in fat. Therefore, the more animal fats we consume in our diet, the greater the risk of dissolving and absorbing carcinogens; (2) A high-fat diet can increase the secretion of bile acids in the intestines, which can potentially stimulate and damage the intestinal mucosa. If you are in this kind of irritation and damage for a long time, it may induce the production of tumor cells and lead to colorectal cancer. Suggestions: 1. Eat less or no food rich in saturated fat and cholesterol, including: oil, fatty meat, animal offal, fish roe, squid, cuttlefish, egg yolk, and palm oil and coconut oil, etc.; 2. Limit vegetable oils (including peanut, soybean and canola oils, etc.) to about 20-30 grams per person per day (about 2-3 tablespoons); 3. Do not eat or eat less deep-fried and pan-fried foods; 4. Eat moderate amounts of Foods containing monounsaturated fatty acids, such as olive oil, tuna, etc.; 5, in the cooking process, to avoid excessive heating of animal foods and vegetable oils (including cooking temperature is too high and heating time is too long). Dietary fiber: prevention of colorectal cancer forces The so-called dietary fiber refers to those plants that can not be hydrolyzed by digestive enzymes in the small intestine and directly into the large intestine components. Numerous evidences show that increasing dietary fiber intake can significantly reduce the incidence of colorectal cancer. The reason for this may be that dietary fiber is highly absorbent and can increase the volume of feces, causing it to form and facilitate defecation. This can shorten the residence time of feces in the intestinal tract, reduce the contact between carcinogenic substances and intestinal wall, and lower the concentration of carcinogenic substances in the intestinal tract, thus reducing the risk of colorectal cancer. In addition, studies have shown that increasing the intake of soluble dietary fiber may also reduce the absorption of animal fats and cholesterol, which also reduces the chance of colorectal cancer to some extent. Suggestions: 1, 30 grams of dietary fiber per day; 2, eat more dietary fiber-rich foods: konjac, soybeans and their products, fresh vegetables and fruits, algae, etc.; 3, under the premise of maintaining the same amount of staple food, use part of the coarse grains instead of fine grains. Vitamins and trace elements: the role should not be underestimated Vitamins and trace elements are essential nutrients to maintain normal life activities. Although, compared with fats, proteins and sugars, their needs are small, and can not produce calories, but they play a role in disease prevention and treatment should not be underestimated. Numerous scientific studies have shown that vitamin A, vitamin C. vitamin E, beta-carotene, trace elements such as selenium have a potential role in the prevention of malignant tumors. Suggestions: 1, pay attention to supplement fresh vegetables and fruits to supplement carotene and vitamin C; 2, moderate consumption of walnuts, peanuts, dairy products, lean meat, seafood, etc., to supplement vitamin E; 3, pay attention to the intake of malt, fish, mushrooms and other food rich in trace elements of selenium; 4, if due to a variety of reasons, it is difficult to ensure that the above foods, can be supplemented with a combination of vitamins and minerals in an appropriate amount. Therefore, low protein, low animal fat, moderate calorie diet, high fiber, high vitamin diet can effectively prevent intestinal cancer.