Caltrate Calcium 600mg & Vitamin D3 400IU Tablets (90). Caltrate 600. Caltrate calcium supplement with vitamin D3 contains calcium 600mg & vitamin D3 in 400IU.. Calcium is an important constituent of bone and vitamin D3 helps the absorption of calcium by the intestine and its deposition in the bones. Caltrate 600 + D3.
