Glucomannan is a fiber derived from the konjac root which can absorb many times its weight in water. fiber in the diet is essential for good health. fiber acts as a bulking agent in the body, which may produce a feeling of fullness. glucomannan is a natural dietary fiber from amorphophallus konjac root and has safely been consumed as food for over 1000 years in the orient. glucomannan has been the subject of various clinical studies. naturalmax glucomannan is an excellent addition to your wei