Diverticular disease consists of three conditions that involve the development of small sacs or pockets in the wall of the colon, including diverticulosis, diverticular bleeding and diverticulitis. Diverticular sacs are caused by pressure along colon walls; fiber in the diet reduces pressure build up. Since most US diets only contain about 10 - 15 grams of fiber/day, it is important to supplement the diet with soluble fiber, the kind found in Konsyl supplements.