What is it?
Glucomannan (GM) is a highly purified water-soluble dietary fiber that is derived from the konjac root (Amorphophallus konjac) also known as elephant yam.
What is it supposed to do?
(GM) is a very soluble and highly viscous dietary fiber that, like any fiber, adds bulk to the diet. Evidence suggests that GM exerts some of its beneficial effects by promoting satiety, and perhaps, the release of certain hormones involved in satiety (e.g., CCK, etc). GM has a extraordinarily high water holding capacity, forming highly viscous solutions when dissolved in water. It has the highest molecular weight and viscosity of any known dietary fiber. What that means in plain English is that GM absorbs a huge amount of water which causes it to expand. That expansion leads to a feeling of fullness or satiety. Of course this is the effect seen with fiber in general and foods high in fiber, thus why higher fiber diets are recommended in general when trying to lose weight. Like other forms of dietary fiber, GM is a “bulk-forming fiber” so it comes as no surprise that it makes for an effective laxative. As is the nature of fiber in the diet, GM may help with blood sugar regulation, reduce cholesterol levels and other blood carried lipids, and increase satiety (by increasing bulk in the stomach) which can lead to reduced calorie intakes.
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