Calfa D Capsule contains Alfacalcidol. Alfacalcidol is Vitamin D-hormone analog, which gets converted to calcitriol in the body. The capsules can help maintain calcium levels and help the body use calcium and phosphate to maintain healthy bones. Alpha D3 is used for treating conditions in which calcium metabolism is disturbed. It is also used in disorders associated with Vitamin D deficiency and in calcium malabsorption. It helps in the development of bone mass, provide relief from muscle and bone pain, and also enhances metabolism. This is a dietary supplement that should be taken to avoid calcium disorders.