"Fiber makes us feel full sooner and stays in our stomach longer than other substances we eat, slowing down our rate of digestion and keeping us feeling full longer. Due to its greater fiber content, a single serving of whole grain bread can be more filling than two servings of white bread. Fiber also moves fat through our digestive system faster so that less of it is absorbed."Meat and dairy products contain no fiber, and refined grains have had most of their fiber removed. To increase your intake of fiber, eat more whole and natural foods, and fewer processed foods."
Go to this great site to read more about the importance of fiber and its role in maintaining or obtaining a healthy weight.