4-In-1 FormulaDietary SupplementPotent Antioxidant Combo Reinforces Your Body's DefensesVitamin C with Zinc, Echinacea and Elderberry for Immune Health SupportScience-Backed Quality Since 1969 Rev up your immune health with Swanson Zinc & C Lozenges This vitamin, mineral and herb blend is a 4-in-1 formula featuring time-honored vitamin C, zinc, elderberry and echinacea all working together to support healthy immune system function. As an increasingly popular immune support supplement, we’ve included zinc to encourage natural killer (NK) cell production and reinforce your immune system. This essential mineral also promotes antioxidant activity to combat free radicals and promote cell and tissue integrity. Combined with antioxidant-rich vitamin C, these ingredients provide a powerhouse of immune health benefits. We’ve added traditional herbal remedy echinacea, relied upon for its immune-supportive properties for centuries, as well as a customer favorite—elderberry—for antioxidant protection and some added support for your body’s defense system. Our elderberry is an extract standardized to 15% polyphenols and 5% flavonoids. Not only are these lozenges loaded with immune helpers, they’re also delicious with their citrus flavor and only need to be taken once a day. Keep immune health locked, loaded and ready for action with Swanson Zinc & C Lozenges.