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Immune Health and Antioxidant SupportDietary SupplementBoosts Antioxidant ActivityProtects Against Free Radical DamageHelps Support Immune System HealthScience-Backed Quality Since 1969Optimize your free-radical defenses with Swanson High Potency Astaxanthin! A member of the carotenoid family this antioxidant nutrient has a molecular structure that makes it remarkably effective at neutralizing free radicals.The antioxidant properties of astaxanthin also offer support for connective tissues throughout the body including joints and tendons as well as healthy skin. It may also protect the heart and blood vessels against oxidative stress and promote healthy eye function. Emerging research indicates that astaxanthin may also offer benefits for exercise performance and recovery.