Sentinel Calcium Oyster Shell with Vitamin D is a dietary supplement providing 500mg of naturally-sourced calcium per tablet. The 100-tablet bottle combines calcium from oyster shells with vitamin D to support optimal bone health and calcium absorption. This supplement helps maintain strong bones and teeth while supporting proper muscle function. The calcium in this supplement is derived from oyster shells, which provides a natural form of calcium carbonate that is well-absorbed by the body. The addition of Vitamin D enhances calcium absorption and utilization. This supplement may be particularly beneficial for adults over 50, post-menopausal women, those with limited dairy intake, or individuals looking to support their bone health through supplementation. The dark amber bottle helps protect the tablets and maintain product integrity.