what is fiber good for
1 When you eat foods high in fiber, such as beans and whole grains, the sugar in those foods is absorbed slower, which keeps your blood glucose levels from rising too fast. 2  This is good for you because spikes in glucose fall rapidly, which can make you feel hungry soon after eating and lead to overeating. Fiber makes your intestines move faster. 2  When you eat whole grains rich in insoluble fiber, it moves faster through your intestines, which can help signal that you are full. 3  Fiber cleans your colon, acting like a scrub brush.