Calcium provides the building blocks that help keep bones and teeth strong and healthy. It also plays a role in the proper functioning of the musculoskeletal and nervous systems. When combined with a healthy diet and physical activity, adequate calcium and vitamin D throughout life may reduce the risk of osteoporosis. Magnesium helps to regulate calcium transport and stimulates the secretion of calcitonin, a hormone that aids in the influx of calcium into bone.* Magnesium is also vital to the release of energy in cells. In addition, it plays an important role in protein formation and healthy muscle function. Vitamin D is required to promote calcium absorption, which helps to maintain healthy bones and teeth. It also supports a healthy immune system. Additionally, vitamin D may support neuromuscular function in older adults. Research supports the positive roles that calcium, magnesium, and vitamin D3 play in supporting bone health. Solgar' Liquid Calcium Magnesium Citrate with Vitamin D3 offers these three important nutrients in one easy-to-absorb liquid formula.