Here are some very good reasons to choose this product: calcium helps maintain bone health.* Meets USP dissolution standards. It has vitamin d, which aids in calcium absorption*. *These statements have not been evaluated by the food and drug administration. This product is not intended to diagnose, treat, cure, or prevent any disease. +This product is not manufactured or distributed by GlaxoSmithKline Consumer healthcare, L.P., distributor of oscal 500+ D. Osteoporosis information: adequate calcium and vitamin d throughout life, as part of a well-balanced diet, may reduce the risk of osteoporosis. Dietary supplement. Essential for strong bones And teeth. Compare to oscal 500 +d Ingredients Quality guaranteed.