Alpha Lipoic Acid is a versatile water and fat soluble metabolic antioxidant. It is a potent free radical quencher and aids other vitamins in their antioxidant activities.* NOW produces a full line of potent antioxidant supplements including: Vitamins A, C, E, Selenium, Grape Seed, Lycopene and Pycnogenol®. Request our retail catalog at your favorite health food store.