Glucomannan is a soluble, bulk-forming fiber derived from the konjac root (Amorphophallus konjac) that can help to maintain intestinal regularity. Glucomannan may also help to maintain serum lipid levels already within the healthy range. , , In addition, by promoting satiety (feeling of fullness), glucomannan can be a convenient addition to a weight management plan that includes a healthy diet and exercise program. Natural color variation may occur in this product. This product is sold by weight not volume.