Swanson Glucomannan Konjac Root is a dietary supplement containing glucomannan, a soluble plant fiber extracted from the konjac root. Glucomannan has the property of absorbing water and forming a viscous gel. Basic Features of Glucomannan Konjac Root: Promotes a feeling of satiety With psyllium, oat bran, apple pectin and more Combines gymnema, chromium and five different fibers to keep your appetite under control Dosage: Take 2 capsules 30 minutes before each meal with a glass of water.