Insulin A hormone produced by the pancreas that helps glucose move into cells of the body where it is used as energy. Insulin is the only hormone in the body that can lower the glucose level in the blood. Related Articles: DPP-IV InhibitorsOverview of Type 2 Diabetes TherapiesEpisode 4: Diabetes Self-ManagementInsulin Treatment in Type 2 DiabetesPhysical Activity and Exercise