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Bioactive Form of Lipoic Acid 210 mg Energy ProductionGlucose Metabolism Antioxidant Support Specialty Dietary SupplementQuality Promise Tested & TrustedGluten-FreeDairy-FreeSoy-FreeNut-FreeR-Lipoic Acid is a form of alpha lipoic acid (ALA)—a versatile antioxidant that is both water- and fat-soluble. As a dietary supplement R-lipoic acid promotes energy production and glucose metabolism making it useful for those who want to support healthy blood sugar levels.