The green coffee bean craze may be over after the authors of the study that launched the product have retracted their research. The original article, published in Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy, suggested that green coffee bean extract could facilitate weight loss in overweight subjects. Soon after, Dr. Oz touted the supplement on his popular TV show and the craze took off. In September, the Federal Trade Commission reviewed the study and found it “so hopelessly flawed that no reliable conclusions could be drawn from it.” There were suggestions that the lead investigator altered data and switched patients from the placebo arm to the treatment arm. The journal published an official retraction on Oct. 16. In addition, Applied Food Sciences, the company that makes green coffee extract products and hired the researchers, has agreed to pay a $3.5 million fine.