All fruits and vegetables are loaded with antioxidant vitamins and phytochemicals which prevent cancer. Peppers contain capsaicin, citrus fruits contain coumarins. Berries, peppers, carrots and tomatoes contain flavinoids. Tomatoes and many other fruits contain lycopenes. Garlic, onions and chives contain S-allycysteine.
Licorice contains triterpenoids.
Barley, wheat and flaxseed contains lignins. Members of the cabbage family contain indoles and isothiocyanates, such as sulforaphane. Beans, peas and lentils contain genistein. The data clearly show that eating lots of fruits and vegetables prevents colon cancer and that eating a diet low in fruits and vegetables is associated with a significantly increased risk of developing colon cancer. I'm Dr. Gabe Mirkin on Fitness.