Sentinel Calcium Oyster Shell is a dietary supplement providing 500mg of natural calcium derived from oyster shells per tablet. Each bottle contains 100 tablets designed to support bone health, teeth strength, and overall calcium needs in the body. Key features: • Natural calcium source from oyster shells • 500mg calcium per tablet • 100 tablets per bottle • Supports bone and dental health • Easy-to-swallow tablet form • Sealed bottle for freshness Calcium from oyster shells is a natural form of calcium carbonate that is well-absorbed by the body. This supplement is particularly beneficial for adults over 50, post-menopausal women, those with limited dairy intake, and individuals concerned about bone density. For optimal absorption, it's recommended to take calcium supplements with food and spread doses throughout the day.