There are two basic types of fiber: soluble and insoluble. Soluble fiber, found in foods such as fruits, seeds, brown rice, barley and oats works mainly by helping to produce a softer stool. It also chemically prevents or reduces the absorption of certain substances into the bloodstream. Insoluble fiber, found in whole grains, vegetables, legumes and the outside of seeds, works like a sponge, absorbing many times its weight in water and swelling up inside the intestines. The result is elimination that is more efficient. Nature’s Three provides: Psyllium which has the highest level of soluble fiber known—more than eight times that of oat bran. Oat fiber –a wholesome source of water-soluble fiber. Apple fiber – provides a host of health benefits.Each 10-calorie serving provides 2 g of dietary fiber.