Glucomannan is a complex sugar and soluble fiber. The most commonly used type is konjac glucomannan, which is taken from the tubers of konjac, a plant native to Asia.

It is also extracted from [R]:

• Eastern white pine

• Higanbana

• Lily

• Orchid

• Ramie

• Redwood

• Suisen

It absorbs water extremely well and has the highest viscosity of any known dietary fiber.

A few grams of glucomannan powder can turn a whole glass (eight ounces) of water into gel.

This fiber has been used in food for thickening and binding, as a fat substitution, and as a preservative.

It has gained in popularity as a dietary supplement, mainly due to its potential weight-reducing effects.

Mechanisms of Action

Glucomannan works by:

• Taking up space in the stomach, making you feel full and eat less

• Decreasing the amount of the hunger hormone ghrelin

• Decreasing the absorption of nutrients (proteins, fats, and sugars)

• Removing bile acids

• Promoting the growth of good bacteria in the gut