Calcium Complex 1200mg with Vitamin D3, K2, B1, B2 & B12 – 120 Softgels. ✔1200mg Calcium Per Serving. ✔With Vitamin D3, K2, B1, B2 & B12. Why does this formula include Vitamin D3 and K2?. Vitamin D contributes to normal calcium absorption, while Vitamin K contributes to the maintenance of normal bones.