Calcium is essential to bones to maintain the strength. If one is not taking a diet rich in calcium, then one can take calcium tablet. This tablet will supply calcium to bones. Ambical D3 tablet containing calcium citrate, magnesium, zinc, and vitamin D3, makes bone strong so that these can not break easily. This tablet can be taken by mouth without or without food. The side effect of a calcium supplement can be stomach upset; especially people who are constipated may feel more trouble in bowel movement. People must store the calcium tablets at room temperature, away from moisture and sunlight.