The glucomannan  is one of several weight loss that has been proven to work.This water-soluble, natural dietary fiber comes from the roots of the konjac plant, also known as the elephant yam.Glucomannan is low in calories, takes up space in the stomach and delays stomach emptying.

It also reduces the absorption of protein and fat, and feeds the beneficial gut bacteria Its exceptional ability to absorb water is believed to be what makes it so effective for weight loss.

