This page is best viewed with a browser that supports tables. Fiber, found only in plant foods, is an indigestible form of carbohydrate that provides plants with structural rigidity. Fiber is classified by its ability or inability to dissolve in water.
Most plant foods contain both types.
Both soluble and insoluble fibers enhance the work of the intestines, but in different ways. Following are some of the health benefits of these types of fiber. Blood sugar regulation. Soluble fiber slows the absorption of sugars and starches from the small intestine into the bloodstream. For someone who already has diabetes, soluble fiber helps control blood sugar levels.