Green Coffee Bean Extract is a substance that is derived from unroasted green coffee beans. Research by Dr. Joe Vinson has recently pointed to the weight loss effects of green coffee. They are primarily due to the high amount of chlorogenic acid, a polyphenol with strong antioxidant properties. It is thought to reduce blood sugar absorption and prevent high blood sugar peaks. Interestingly, roasting coffee beans while it leads to that rich flavor and aroma we all love also breaks down the chlorogenic acid content of the bean. Leaving the coffee in its natural state by not roasting it allows us all to reap the full power of the bean. Dr. Vinsons study involved sixteen overweight males and females. Participants did not alter their diet or exercise routines; they simply took one pill of green coffee powder (ground green coffee beans) before every meal. Over the course of 22 weeks, the study saw participants shed about 17 pounds each, equaling about a 10% total body weight loss overall. The weight loss was due to fat loss, as participants body fat decreased by 16%. Absolutely no side effects were observed.