Cal-C-Vita Vitamin C + Zinc Effervescent Tablets - Immune Support and Antioxidant Protection. ‣ Provides Vitamin C and Zinc for immune system health. ‣ Effervescent form for quick absorption. ‣ Antioxidant properties to combat free radicals. SUGGESTED USE: Dissolve 1 tablet in a glass of water daily, preferably in the morning. INGREDIENTS: Vitamin C, Zinc, Excipients.