Emergen-C Immune Defense Formula. The Feel-Good way to strengthen your immunity ever day! No matter what elements the seasons throw your way, strengthening your defenses has never been easier or tastier. Emergen-C Immune Defense Formula is perfect to take all year round. Just pour! Naturally flavored and naturally sweetened, each fizzy, refreshing Ruby Lemon Honey packet brings a rush of 26 nutrients, antioxidants and minerals, including 1000mg of vitamin C, enhanced Zinc, A and D Vitamins, and extracts of Hibiscus and Elderberry. Boost immunity, increase metabolic function, and ignite your energy level without caffeine.