A crossover study in twenty healthy normal and twenty healthy type 2 diabetic subjects will be utilized. Each subject will be admitted the the GCRC the night prior to beginning the study in order to insure metabolic stability at the start of the protocol. Each subject will stay in the GCRC three full days (three nights) from the time of admission. Each subject will be admitted on two separate occasions, separated by at least a two week interval. A diagram of the protocol is given below: