Lipozene

Lipozene is a brand name dietary supplement sold by Obesity Research Institute, LLC. The primary ingredient in Lipozene is glucomannan.

Clinical trials examining the use of glucomannan for weight loss have produced mixed results. A 2014 systematic review and meta-analysis of clinical trials failed to show that glucomannan supplementation generated statistically significant weight loss. Obesity Research Foundation, LLC was fined $1.5 million by the Federal Trade Commission in 2005 for misleading statements about weight-loss results from a similar glucomannan-containing product.

Lipozene contains a single ingredient, glucomannan, a water-soluble, fermentable dietary fiber extracted from the tuber or root of the elephant yam, also known as Konjac (Amorphophallus konjac or A. rivieri).

Adverse events include abdominal discomfort, diarrhea, and constipation.

...
Wikipedia