dietary fiber dietary fiber dietary fiber studies show how much fiber the average American eats dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber CBS News February 5, 2014 dietary fiber dietary fiber don't get enough fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber eat enough fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber recent study dietary fiber dietary fiber dietary fiber grain dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber dietary fiber