Green coffee extract contains high levels of active compounds called quotchlorogenic acidsquot and one in particular called quot5 caffeoylquinic acidquot these chlorogenic acids work by suppressing the amount of glucose that is absorbed in the small intestine glucose is used for energy so if the body cannot use glucose it turns to other sources such as fat the idea is that it helps you to burn more fat by restricting the absorption of glucose it is advised that to achieve maximum