It is prescribed for type 1 and type 2 diabetes. It does promote additional insulin production in type 2 but the main benefits of type 1 are that it stops the pancreas from releasing Glucagon which stops the liver dumping sugar into the blood and slows down the release of food from the stomach. The results are that your appetite is suppressed so you eat less as you feel full. The amount of insulin needed by your body will also drop due to the Glucagon reduction. less food also means less insulin. both of these factors means weight loss.