21st Century Calcium, Magnesium, Zinc & Vit D Tablets Is a convenient blend of minerals and vitamin D which delivers Calcium, vitamin D, Magnesium, and Zinc in one convenient form for optimal nutritional support and helps to improve bone density and prevent bone loss while supporting healthy bones, teeth, muscles, and the immune system and promoting overall health and wellness, as Calcium is the primary mineral responsible for strong bones and teeth and helps maintain healthy bones and teeth, enables muscle movement, and regulates the transfer of messages by nerves from the brain to different parts of the body, Vitamin D helps the body absorb calcium, enables muscles to move, and supports healthy bones by stimulating bone-building cells, Magnesium plays an essential role in bone and muscle health by supporting muscle contraction and relaxation, influencing bone formation, acting as a cofactor in activating vitamin D, and this formula contains a unique blend of ingredients that help increase nutrient absorption so the body gets the most out of every dose.