Many nutritionists and researchers refer to Alpha Lipoic Acid (ALA) as the "universal antioxidant" based on its fat/water solubility. This allows it to travel to virtually any cell in the body to quench cell damaging oxidation. In addition, ALA has been shown to increase the free radical fighting abilities of other vitamins and antioxidants, especially C and E. NOW ALA 600 mg uses only the highest grade Alpha Lipoic Acid available, and delivers it in a high potency that has been proven safe in studies. To further support antioxidant activity, we've added 30 mg of Grape Seed Extract and 5 mg of Bioperine, a potent compound that helps enhance the absorption of ALA.