How does vitamin D help to prevent osteomalacia?

Alfacalcidol is a type of vitamin D used to treat a number of conditions such as osteomalacia (rickets), familial hypophosphatemia, hypoparathyroidism, osteodystrophy, vitamin D deficiency, and so on. Also, this medication is used to increase the levels of vitamin D, calcium, and phosphate in the body. It belongs to a group of medicines called vitamin D analogues.