insoluble dietary fiber
Legumes are rich in solubleand insoluble fiber. Fiber is made up of non-starch polysaccharides, such as cellulose, dextrins, inulin, lignin, chitins, pectins, beta-glucans, waxes and oligosaccharides. The word fiber is misleading, because many types of dietary fibers are not fibers at all.There are two broad types of fiber, soluble and insoluble. 1  Soluble fiber dissolves in water. 2  It changes as it goes through the digestive tract, where it is fermented by bacteria.3  As it absorbs water it becomes gelatinous.he word fiber is misleading, because many types of dietary fibers are not fibers at all. There are two broad types of fiber, soluble and insoluble. 1  Soluble fiber dissolves in water. 2  It changes as it goes through the digestive tract, where it is fermented by bacteria. 3  As it absorbs water it becomes gelatinous.