Dietary Supplement drops. Artificially flavored. Excellent source of antioxidant vitamins C & E. Exchange Information: One (1) drop = free exchange. Eight (8) drops = 1 fruit. Halls Defense with antioxidant vitamins C & E is a great tasting supplement that can be incorporated in your everyday life. Vitamins C and E are dietary antioxidants that help maintain healthy cells. See more here.