Byetta causes slow gastric emptying thus keeping you full for longer periods of time and in turn causing weight loss because you are eating less.
byetta replaces a hormone that is deficient in type 2's, and that hormone increases insulin secretion, reduces amount of glucose put out by the liver, and delays stomach emptying so that you feel fuller. Glad to hear it's working for you Steff, have you gone up to the 10mcg pen yet?