Your body needs calcium to build and maintain strong bones. Your heart, muscles and nerves also need calcium to function properly. Some studies suggest that calcium, along with vitamin D, may have benefits beyond bone health: perhaps protecting against cancer, diabetes and high blood pressure. It is important to take calcium with vitamin d as vitamin d helps calcium get into our bones. It is so important to make sure that you are consuming enough calcium via diet or supplements as our bodies do not produce it and we loose it through our hair sweat and urine.