Sentinel Calcium 500 mg with Vitamin D is a dietary supplement derived from oyster shells, providing 500mg of calcium per tablet. The bottle contains 100 tablets and includes vitamin D for enhanced calcium absorption and utilization by the body. This calcium supplement uses natural calcium carbonate sourced from oyster shells, combined with vitamin D to support optimal bone and dental health. It may be particularly beneficial for adults over 50, post-menopausal women, those with limited dairy intake, or people at risk for bone density issues. The supplement helps maintain proper muscle function and nervous system health while supporting normal blood clotting processes. The tablets come in a sealed amber bottle to maintain product freshness and integrity.