Earth's Splendor 1000 mg Calcium, 400 mg Magnesium, and 15 mg Zinc tablets are formulated to support bone and muscle, heart, and immune system health. Features :- HEALTHY BONES AND MUSCLES: Calcium supports healthy bones and teeth. It also supports normal muscle contractions and nerve impulse transmission for healthy muscles. IMMUNE SYSTEM AND HEART HEALTH: Zinc supports a healthy immune system. Magnesium supports normal, healthy function of the heart and the circulatory system. 1+ MONTHSUPPLY: With 100 tablets, Earth's Splendor Calcium, Magnesium, Zinc gives you a 1+ month supply.