Green coffee bean extract is one of the newest hot weight loss products on the market. It is an extract derived from coffee before it is roasted (hence coffee is usually brown to black in color after roasting). Roasting has an effect on coffee taste and reduces the active compound in green coffee bean extract called chlorogenic acid.
Chlorogenic acids found in green coffee bean extract have healthy benefits while having an influence glucose and fat metabolism. A 22-week crossover study indicated that GCB extract was safe and effective in helping reduce weight in 16 overweight individuals. Individuals in this study followed no diet or exercise program. Body weight and body fat were both reduced. Additionally a meta-analysis on GCB extract showed a significant reduction in body weight with overweight individuals over placebo.