Calcium is a major mineral best known for its role building and maintaining strong, healthy bones and teeth. Calcium, however, also transports nutrients across cell membranes; produces hormones and enzymes involved in digestion and metabolism; is involved in nerve cell communication; promotes blood clotting and wound healing; and assists with muscle contractions. While this essential mineral plays a role throughout life, it is especially important for growing children and adolescents to help establish bone mass for maintaining strong bones. Emerging research shows that Vitamin D is a major ally in preventing major diseases. This is a classic combination for anyone looking for bone-building calcium with the added benefit of disease-fighting Vitamin D for optimal absorption. This synergistic formula helps to effectively treat and reduce the risk of osteoporosis.