Green Coffee Grano for Weight Loss - When you take from raw coffee, it inhibits the release of glucose in the body, help stimulate metabolism. These two mechanisms beget two main roles. One is to prevent fat storage in the body and the other to suppress appetite. This double effect prevents the body from gaining extra weight. You can't enjoy drinking plain black coffee because it goes through the roasting method. It destroys any chlorogenic acids found in the original green coffee beans.