Sundown Naturals Alpha Lipoic Acid is an excellent antioxidant choice. One Alpha Lipoic Acid capsule a day can help support overall good health. ALA is known as the “universal antioxidant” because it works in both the water-soluble and fat-soluble compartments in cells, and helps other antioxidants do their part. Helps sugar metabolism. Promotes energy production. Antioxidant booster for skin.