Dietary fiber is the part of food from plants that cannot be digested. Dietary fiber helps to absorb water or remove waste from the body. Dietary fiber has many parts that plants have, and is eaten in plant foods.
Dietary Fiber  Archived 2011-09-27 at the Wayback Machine is grouped if it is soluble or insoluble. Soluble means if it helps to absorb water or not. If it is insoluble, it helps remove wastes from the body.