People consuming a high intake of garlic, which was not quantified, had 26% less cancer of the large bowel compared to people who had a low intake of garlic according to a 2006 study from Milano, Italy which used data from an integrated network of Italian and Swiss case-control studies.

(Subjects were simply asked if they had a low intake, moderate intake or high intake of garlic.)

People consuming seven (7) or more servings of onions per week had 56% less cancer of the large bowel compared to people who did not consume onions according to a 2006 study from Milano, Italy which used data from an integrated network of Italian and Swiss case-control studies.

Obese women (BMI of 30 or more) have a 32% greater lifetime risk of bowel cancer than healthy weight women according to Cancer Research UK .