fiber
(FYE-bir)
The parts of fruits and vegetables that cannot be digested. Fiber may be helpful in lowering the risk of colon cancer. But this is still not proven. Fiber is sometimes called bulk, or roughage.
For information about how nutrition can affect breast cancer risk, see Breastcancer.org's Nutrition and Breast Cancer Risk Reduction pages.
Audio contributed by: Marisa Weiss, M.D.