Vitamin D is a fat-soluble vitamin that regulates calcium and phosphate homeostasis. It promotes the absorption of calcium and phosphorus from the bowel and enables mineralisation of newly formed osteoid tissue in bones, as well as having a role in neuromuscular function.
This is a companion discussion topic for the original article at https://patient.info/doctor/orthopaedics/vitamin-d-deficiency-including-osteomalacia-and-rickets-pro