Apollo Pharmacy Calchoice is a dietary Supplement & it contains the combination of Calcium with vitamin D3. It helps to treat conditions caused by low calcium levels such as bone loss (osteoporosis) weak bones (osteomalacia/rickets). It may also be used in certain patients to make sure they are getting enough calcium (e.g. women who are pregnant nursing or postmenopausal). It is necessary for normal functioning of nerves cells muscle and bone. Vitamin D helps your body absorb calcium and phosphorus. Having the right amounts of vitamin D calcium is important for building and keeping strong bones.