Kal - R-Lipoic Acid ActivOxidant 100 mg. - 60 Vegetarian Capsules Kal ActivOxidant R-Lipoic Acid is the natural R-form of the antioxidant Alpha Lipoic Acid. It is bonded to sodium for optimal stability and bioavailability. This product has been studied for its reputed antioxidant role. R-Lipoic A