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 2 DiabetesThe beginning of the school yearEpisode 3: A Real Diabetes Patient Story with LeonInsulin Treatment in Type 1 DiabetesOverview of Type 2 Diabetes Therapies