No. Vitamin K is a vitamin, while calcium is a mineral. They are different nutrients that intersect in bone and vascular biology. Calcium is a structural building block of bone; vitamin K helps activate proteins that influence how calcium is utilized in tissues. Think of calcium as the “brick” and vitamin K as part of the “regulatory signals” that help guide where calcium is incorporated. This does not mean everyone needs supplements—diet, labs, risks, and medications (especially anticoagulants) should guide decisions.