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Immune Health500 mg Per CapsuleStandardizedDietary SupplementVegetarianDelivers 10% PhycocyaninSupports Immune System and Cardiovascular HealthNatural Source of Vitamin A Vitamin K and ZeaxanthinScience-Backed Quality Since 1969Spirulina also known as blue-green algae is widely used to promote good daily health. But there's a lot of variation among products. Swanson Standardized Spirulina changes everything. The patented spirulina in this formula delivers 10% phycocyanin one of the algae's most active components. This formula has the potential to support the immune system unlike any other spirulina supplement available.