Konjac Fibre has almost no calories, but is very high in fibre. It is a plant of the genus Amorphophallus, native to tropical Eastern Asia..P> Konjac has very little taste and is becoming more and more popular as a diet food e.g. as a substitute for pasta. Glucomannan in an energy restricted diet contributes to weight loss. Glucomannan contributes to the maintenance of normal blood cholesterol levels. Konjac Fibre has almost no calories, but is very high in fibre. It is a plant of the genus Amorphophallus, native to tropical Eastern Asia..P> Konjac has very little taste and is becoming more and more popular as a diet food e.g. as a substitute for pasta. Glucomannan in an energy restricted diet contributes to weight loss. Glucomannan contributes to the maintenance of normal blood cholesterol levels.