Does smoking cause colorectal cancer? It is common knowledge that smoking is harmful to your health. Cigarette smoke contains many clear and probable carcinogens, including polycyclic aromatic hydrocarbons, tobacco-specific ammonium nitrite and heterocyclic aromatic amines, the latter two of which are associated with tumorigenesis at sites not directly accessible by smoke, including the gastrointestinal tract, where these substances can reach target organs through the systemic circulation and exert toxic effects. Whether smoking is associated with colorectal carcinogenesis is controversial in early studies. Currently, there is a preference for smoking as a factor in the development of colon cancer. Studies have confirmed that smokers have a 34% higher risk of dying from colon cancer than nonsmokers, and the longer the years of smoking, the higher the mortality rate from colorectal cancer; in women, the risk is approximately 43% higher. Continuing to smoke after a cancer diagnosis increases the risk of death. Experts believe that smoking, especially long-term continued smoking, is strongly associated with increased mortality from colorectal cancer. Therefore, it is recommended that smokers should quit smoking, and the sooner the better, and non-smokers should not start smoking. Does liking chili cause colorectal cancer? No, after the investigation and follow-up of spicy people, we found that the chance of colon cancer in spicy people is lower than that in non-spicy people, and spicy foods such as chili, ginger and pepper may also have certain anti-cancer effects. The mechanism may include: 1. Capsaicin can increase saliva secretion, promote appetite and improve digestion; 2. The stimulation of taste caused by spicy food reflexively causes diastolic blood pressure to rise, promotes blood circulation, and increases intestinal vascular perfusion. Some studies have shown that capsaicin can induce apoptosis in some cell lines of human colorectal cancer and stop the growth of tumor cells, which may have a certain effect on the treatment of rectal cancer; however, it has also been suggested that capsaicin may also promote the metastasis of intestinal cancer cells. However, patients who have already suffered from colorectal cancer and after surgery for bowel cancer should reduce the consumption of spicy food. Spicy food can easily stimulate the intestinal tract and cause diarrhea and other discomforts, and is not conducive to the healing of surgery. Does obesity cause colorectal cancer? Obesity and high body mass index are both risk factors for colorectal cancer. Studies have shown that overweight, especially central obesity, is definitely a risk factor for colorectal cancer, and several studies have shown that a high-fat diet and abdominal obesity increase the chance of colon adenoma in both men and women, and that colon adenoma is more likely to become cancerous than other polyps. Regardless of gender, elevated body mass index increases the risk of colon cancer, and this phenomenon is more prominent in men; while the relationship between body mass index and rectal cancer incidence is only shown in men, but not in women. Does alcohol consumption cause colorectal cancer? Some studies have shown that people with a family history of colorectal cancer who consume more than 30 grams (inclusive) of alcohol per day (i.e., 2 glasses of American or 4 glasses of English wine) are at increased risk for colorectal cancer. The practices that maximize the risk of colorectal cancer are eating red meat, smoking heavily, and consuming very little folic acid (indicating less green vegetables and cereal). So overall these people had the least healthy lifestyles. Those surveyed without a family history did not show a correlation between alcohol intake and the development of colorectal cancer. Studies have confirmed that alcohol drinkers have a higher risk of dying from colon cancer than non-drinkers. Foreign studies have found that the mortality rate from sigmoid colon cancer in men who drink alcohol daily is five times higher than in non-drinkers.