NaturesPlus Cal / Mag / Vit D3 with Vitamin K2 fuses core synergistic essential nutrients for unparalleled support for maintenance of normal bones*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.. Calcium and magnesium work dynamically with the most powerful, most bioavailable forms of vitamin D3 (cholecalciferol) and vitamin K2 (menaquinone-7). Prechelate minerals are specially blended with non-GMO rice protein.