NOW combines three well known immune-enhancing ingredients in this high potency seasonal support product.* With the antioxidant and immune power of vitamin C plus the immune-supporting properties of vitamin D and zinc, this combination helps optimize the body s immune response to environmental challenges.* This product utilizes Albion Zinc Bisglycinate, a form of zinc that has been shown in clinical studies to have superior bioavailability compared to other forms of supplemental zinc. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Results may vary. Consult your healthcare provider before starting any supplement regimen.