Glucomannan is a linear polysaccharide consisting of 1, 4-beta – linked D-glucose and D-mannosyl residues, in which the ratio of glucose to mannose (Glc:Man) varies greatly. The Glc:Man ratio of konjac glucomannan is about. At 2:3, the ratio of aloe glucomannan is 1:2, while the ratio of Shalep glucomannan is about 1:4. All polysaccharides are acetylated, which gives them water solubility. Glucomannan is the main cell wall reserve carbohydrate in tubers of several plant genera. At certain stages of plant development, glucomannan is degraded and used as an energy source