It is best to prevent the lack of calcium by eating sufficient amounts from childhood to build strong bones to prevent the problems of deficiency that may not be compensated by treatment, and is treated calcium deficiency in the diet by increasing the intake of food sources, which we will mention below, as can be described by the doctor Calcium supplements may be prescribed for the patient at different doses depending on the situation. Vitamin D may also be prescribed with exposure to sunlight if calcium deficiency is accompanied by vitamin D deficiency because of its important role in absorption. Calcium or vitamin D should not be taken over-the-counter.