Glucomannan, a 100% natural soluble fiber, has been shown in an 8-week clinical study to produce 5.5 pounds of weight loss versus those in a placebo group who gained 1.5 pounds. The test subjects did not change their diet or exercise habits. They simply took 1 gram (1,000 mg) of glucomannan with water one hour before breakfast, lunch and dinner.
Glucomannan works due to its incredible bulk-forming, water absorbing power that provides a sense of fullness, thereby reducing appetite.
Glucomannan also has the effect of reducing the glycemic index of a meal by delaying the rate food exits the stomach. This can reduce the insulin response to a meal by up to one half. Insulin is the culprit that converts excess sugar into fat.