Green coffee extract is an extract of unroasted, green coffee beans. It is used in the Swiss Water Process for decaffeinating coffee. It has also been used as a weight-loss supplement and as an ingredient in other weight-loss products but its efficacy and mechanism of action have been controversial.
There is tentative evidence of weight-loss benefit; however, the quality of the evidence is poor. In 2014, one of the primary trials showing benefit was retracted and the company that sponsored the study, Applied Food Sciences, was fined by the Federal Trade Commission for making baseless weight-loss claims using the flawed study.Green coffee extract is sold under various proprietary brand names including Svetol, and is included in weight-loss products such as CoffeeSlender.