Sentinel Calcium Oyster Shell 500 Plus D is a dietary supplement that combines 500mg of natural calcium derived from oyster shells with Vitamin D. Each bottle contains 100 tablets designed to support bone health, teeth strength, and proper calcium absorption. The calcium in this supplement comes from natural oyster shells, which provides calcium carbonate in a form that can be 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 concerned about bone health. The tablets come in a dark amber bottle to protect the contents and maintain product stability.