Fiber is a non-digestible form of carbohydrates. But, there are different types of fiber. These include soluble and insoluble fibers. Both are inherently non-digestible and tend to be good for overall health but there are distinct differences between the two. Soluble fiber dissolves in water and has been shown to be beneficial in lowering blood cholesterol. Soluble fiber can exert this effect by binding to bile acids (which are found in your stomach, secreted by your gallbladder, and needed to make cholesterol) and removing them from the body