Calcium 500 mg plus Vitamin D Tablets, 60 ct, QC95210 Sale! This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Compare to Os-cal Extra D. Calcium is an important mineral for helping to support bone health. Vitamin D3 is added to assist with helping to absorb calcium. No added yeast or artificial flavors and gluten-free.