Each box contains 200 tablets of Caltrate 600 + D3 to support strong, healthy bones. No other calcium supplement has more vitamin D3 to help maximize calcium absorption. Trust Caltrate, the expert in calcium, to help replenish the calcium & help provide the vitamin D3 your body uses every day. Sufficient calcium & vitamin D as part of a healthy diet may reduce the risk of osteoporosis. The calcium in Caltrate 600+D3 also plays an important role in the health of your nerves, hormones and teeth.