In nature, fiber comes from three sources — fruits, vegetables and grains. In Lewis Labs Fabulous Fiber the most beneficial of each type of fiber has been selected and balanced to provide a concentrated supplement of unique quality. It provides a more effective bulking function, yet it has none of the harshness of bran fiber. In addition to bulk, Fabulous Fiber provides you with the special benefits of the gums, pectins, hemicelluloses and polysaccharides found in fruits and vegetables. Just as in nature, these fibers are combined with all the essential vitamins and minerals to give you the ultimate in fiber supplements.