1, reduce the intake of oil: the oil in edible oil itself will not cause cancer, but it can promote bile secretion. A large amount of bile can produce bile acid under the action of bacteria in the intestine, and bile acid has a certain carcinogenic effect, so to reduce the intake of oil, the daily intake of oil should be below 50 grams.

2. Eat more fresh vegetables: Healthy people can eat more fresh vegetables rich in vitamins and cellulose. Vegetables rich in cellulose can stimulate gastrointestinal peristalsis and increase the frequency of defecation. Vegetables rich in cellulose can take away carcinogens and toxic substances through feces: celery, cabbage, radish and so on.

3. Ensure a balanced and diversified diet: People should cultivate healthy and diversified eating habits, maintain a balanced and diversified nutritional intake, avoid eating foods with high fat and high protein for a long time, and ensure diversified intake of vegetables, meat and staple foods. Diversified diet not only ensures adequate nutrition supply for human body, but also effectively prevents constipation, which has a positive effect on preventing rectal cancer.

4. Try not to eat or eat less pickled foods such as pickles: Pickled foods contain carcinogens such as nitrite, and people's long-term consumption of pickled foods will increase the incidence of rectal cancer, so they should eat as little as possible.