Innovative Research Scientific Integrity Advanced Series 90 Servings Dietary Supplement 100% Vegetarian GMP Manufacturing Independent Testing Quality Assured Discussion: Antioxidant LA provides R+ lipoic acid and N-acetyl-L-cysteine in a powerful combination antioxidant formula. The R+ form is the only biologically active form of lipoic acid, and NAC is the most effective enhancer of the all-important antioxidant glutathione (GSH). Antioxidant LA is formulated to extend the benefits of these antioxidants for the maintenance of good health.