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Vitamin CImmune HealthVitamin SupplementSupports Immune System Function and Boosts Antioxidant ReservesDelivers a 1:1 Ratio of Vitamin C and Citrus BioflavonoidsScience-Backed Quality Since 1969Enhance your antioxidant load with the help of Swanson Supreme C Complex! This unique formula features citrus bioflavonoids and rutin to help promote vitamin C's absorption. Each capsule delivers 500 mg of vitamin C.