21st Century Cal Mag Zinc + D Tablets - Comprehensive Bone and Immune Support, Daily Tablets ‣ Promotes bone health with calcium, magnesium, and vitamin D. ‣ Supports immune function with zinc. ‣ Enhances calcium absorption. ‣ Convenient daily tablet. SUGGESTED USE: Take one to three tablets daily with any meal, or as directed by your healthcare provider. INGREDIENTS: Calcium (as Calcium Carbonate), Magnesium (as Magnesium Oxide), Zinc (as Zinc Gluconate), Vitamin D3.