The use of green coffee bean extract as a weight-loss supplement is controversial since its marketing is based on the results of flawed clinical studies. The Federal Trade Commission has advised consumers against this product, considering manufacturers are making deceptive claims.
Green coffee bean extract became popular as a weight-loss supplement since it was introduced to the audience by Dr. Mehmet Oz on his TV show in 2012. The scientific premise is that the chlorogenic acid present at high levels in not-yet-roasted coffee beans has health benefits and burns fat with no need of diet or exercise.
The FTC' s Bureau of Consumer Protection has been winning settlements against the companies that produce or sell green coffee bean extract, since none of them has been able to present accurate data to support this premise.