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Respiratory HealthAdvanced FormulaDietary SupplementEnzyme and Antioxidant Flavonoid to Support Healthy Respiratory FunctionSupports Healthy Seasonal Immune System FunctionScience-Backed Quality Since 1969For added immune support try Swanson Quercetin & Bromelain. This unique formula combines the bioflavonoid quercetin with the pineapple derived enzyme bromelain to support upper respiratory function. Each capsule delivers 250 mg of quercetin and 78 mg of bromelain.