* A Good Source of Fiber * Fiber is an Important Part of a Healthy Diet * Dietary Supplement * Guaranteed Quality - Laboratory Tested Glucomannan is a natural fiber derived from konjac root. Fiber is an important part of a healthy diet and can help maintain the healthy functioning of the GI tract. Fiber adds roughage to the diet, which is important for digestion. In addition, a high fiber diet helps maintain cholesterol levels that are already within the normal range.