Dietary fiber from fruits, vegetables, and whole grains acts as a scouring agent to brush out waste from the digestive tract. It provides bulk that softens waste material to pass smoothly through the intestines and colon. Without enough fiber consumption, stools can become hard and difficult to pass, putting pressure on the colonic walls. According to a large study published in The American Journal of Gastroenterology, consumption of fiber from various food sources is inversely related to the risk of diverticulitis.

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