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: The beginning of the school yearEpisode 2: The ABCs of Diabetes with Dr. Sudipa SarkarInsulin Treatment in Type 1 DiabetesSelf-Monitoring of Blood GlucoseEpisode 3: A Real Diabetes Patient Story with Leon