Os-Cal 500 mg Calcium + 200 IU D3, 75 caplets Sale! from 859 1031 /per Qty. Sold Out This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Vitamin D is essential for normal calcium absorption Essential to reduce the risk of osteoporosis The calcium in Os-Cal Calcium + D3 is calcium carbonate - the most concentrated form of calcium salt Os-Cal Calcium + D3 has the added benefit of 200 IU Vitamin D3, which helps the body absorb calcium Qty available:0 Tweet