Jarrow Formulas Glucose Optimizer is a comprehensive combination of nutrients that improve glucose metabolism and antioxidant protection: Alpha lipoic acid facilitates reduction of blood glucose and supports general metabolism by its effects on energy production; Glucosol contains colosolic acid, an activator of glucose transport; Green Tea Extract (45% OPCs) is added to support strength of capillaries and other blood vessels; Magnesium is involved in metabolism of glucose and energy production reactions involving ATP.