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: Insulin Treatment in Type 1 DiabetesSelf-Monitoring of Blood GlucoseEpisode 2: The ABCs of Diabetes with Dr. Sudipa SarkarGetting Started on a Plant-Based DietThe beginning of the school year