Lipoic or alpha-lipoic acid is a superantioxidant. Both fat and water soluable it can work in both the watery and fatty portions of the cell. It helps control blood sugar and insulin levels, and helps block formation of AGEs that accelerate aging. Production declines with age. (Carper, Jean. Your Miracle Brain. NY: HarperCollins Publishers, Inc., 2000, pp 231-234)