Researchers at Arizona Cancer Center also found that half a cup of All-Bran daily might help curb the recurrence of colon cancer after surgery. Wheat bran helps usher cancer-stimulating estrogen out of the body, presumably cutting the risk of breast cancer. In one study at the American Health Foundation, about 15 grams of wheat bran fiber daily lowered estrogen levels 17 percent in premenopausal women. Tufts researchers found that wheat fiber suppressed circulating estrogen better than a low-fat diet did. Evidence also suggests high-fiber wheat bran may cut the risk of endometrial and stomach cancer.
Nothing beats the roughage in bran for preventing constipation, experts say.
Bran adds bulk to the stool, which is safer than laxatives that stimulate nerves in the colon. Increase fiber gradually to avoid gas, bloating and possible bowel obstructions. Drink plenty of fluids. Eating more did not further lower cholesterol. Credited with lowering cholesterol are oats' beta glucans, a soluble gummy fiber.