Healthy Bones and Teeth: – Adequate calcium intake can help improve bone health and prevent bone degeneration. Osteoporosis is a disease characterized by excessively weak bones and is the result of a deficiency in calcium and other bone supporting nutrients, including magnesium. Calcium is responsible for proper bone formation and maintenance whereas magnesium helps improve bone quality and maintain bone mass. A 4-year study on the effects of calcium supplementation on bone density found that calcium supplementation reduced the rate of bone loss in elderly women, and is useful in the treatment of osteoporosis. Proper Muscle Function: – Calcium is critical for contraction and relaxation of the muscles, including that of the heart. Deficiency in calcium can cause muscle stiffness or tetany. Magnesium also plays an important role in muscle relaxation and reduces the incidence of cramps or spasms. Heart Health Calcium is vital for the maintenance of a regular heartbeat. Together with magnesium, it helps improve the function of heart muscles.