Whole grains have other digestive benefits as well. The fiber content keeps bowel movements regular (studies have shown that people who eat more fiber need fewer laxatives). And they help ward off diverticulosis, the condition in which little pouches form in the colon wall, causing inflammation, constipation, diarrhea, and pain. Fiber is responsible for much of the benefit, but whole grains also contain lactic acid, which promotes "good bacteria" in the large intestine. These organisms aid digestion, promote better nutrition absorption, and may even beef up the body's immune system.
