Fiber is good 4 you. Fiber, of both water soluble and water insoluble variety, provides health benefits. Fiber accelerates how quickly food transits through the gut. Fiber adds bulk to stool and improves bowel regularity. Fiber can be used as an adjunct to weight loss by filling you up without excess calories, and in so doing restricting fat intake. But too much fiber can make you gassy and increase stool volume.