Green coffee bean extract is a decaffeinated extract of unroasted coffee beans, which have a higher level of chlorogenic acids than roasted beans. Chlorogenic acids are a powerful natural antioxidant and are thought to provide support for normal metabolic processes, making green coffee bean extract a popular natural supplement for the support of normal weight maintenance.* Our formula contains GCA (Green Coffee Antioxidant), a patented, standardized extract valued for its high concentration of chlorogenic acids. Each 800 mg serving of NatureWise Green Coffee Bean Extract contains less than 20 mg of caffeine, about the same as two cups of decaf coffee.