Antioxidant Support Dietary Supplement Maintains Cellular Energy Production May Support Cardiovascular Health Boosts Antioxidant Activity Science-Backed Quality Since 1969 Get high-powered antioxidant protection and effective metabolic support with Swanson Alpha Lipoic Acid 300 mg. This alpha lipoic acid supplement offers effective antioxidant support, helping to neutralize free radicals and enhance the activity of other antioxidants like vitamins C and E while amplifying the positive effects of other important antioxidants in the body such as glutathione and coenzyme Q10.