CwrelCal-D CwrelCal-D – The one & Only Naturally ionized calcium CwrelCal-DCoralcalcium-500mg + Vitamin D3-600iu + Vitamin K27- 50mcg + Magnesium-100mg + Zinc-12mg Tablets CwrelCal-D Coral Calcium Tablet is a premium quality high absorption and bioavailable coral calcium with micronutrients in ideal strength elemental coral calcium 500 mg with vitamin D3.