A powerful antioxidant, Alpha-Lipoic Acid 150 from Doctor's Best delivers 150 mg of this free radical fighter. ALA supports the body's defenses against free radicals, recycles antioxidant nutrients such as vitamins C and E and maintains a healthy blood sugar level already within a normal range when used as part of a healthy diet. ALA is a fatty acid that functions like a vitamin. As a coenzyme, ALA plays an important role in the metabolism of glucose that produces energy in cells.