Sentinel Calcium 500mg + Vitamin D is a dietary supplement containing 100 tablets that combines calcium from oyster shells with vitamin D for optimal bone and dental health support. Each tablet provides 500mg of calcium enhanced with vitamin D to promote better absorption and utilization by the body. This supplement is particularly beneficial for individuals who may need additional calcium support, including adults over 50, post-menopausal women, those with limited dairy intake, or people at risk for bone density issues. The calcium is sourced from natural oyster shells and formulated with vitamin D to enhance absorption. The combination helps maintain proper muscle function and nervous system health while supporting strong bones and teeth. The tablets come in a sealed amber bottle to maintain freshness and product integrity.