The average number of bowel movements a week is compared between those eating prunes, those taking a fiber supplement, and those eating a strictly plant-based diet.
Even when fiber and fruit and vegetable intake are kept constant, choosing foods richer in antioxidants may increase stool size, which is associated with lower cancer risk.
Most women experience a four-day intestine transit time, likely too long to meet the target 200 gram (half pound) minimum fecal output for cancer prevention.