A supplement isolated from green coffee beans is showing great promise in helping people lose weight, regulate blood sugar, and reduce blood pressure. Coffee beans contain a wide range of active compounds that can affect our health. One of these constituents, chlorogenic acid, has been shown to improve glucose metabolism, inhibit the accumulation of fat, and decrease the absorption of glucose in the intestines. Roasting coffee beans destroys most of the chlorogenic acid, so drinking a cup of coffee will not yield these benefits. Only raw green coffee beans contain a significant amount of this health-promoting compound.