Dr Terence Ong is a Research Fellow at Nottingham University Hospitals NHS Trust.
Professor Opinder Sahota is Professor of Orthogeriatric Medicine and Consultant Physician at Nottingham University Hospitals NHS Trust
Vitamin D is not, in the truest sense, a vitamin because it is not exclusively obtained through diet alone. It is a secosteroid, mostly obtained intrinsically by the effect of ultraviolet radiation on previtamin D compounds and subsequent hydroxylation in the liver and kidneys.
Vitamin D plays an important role in calcium and phosphate homeostasis through its effect on gut and bone metabolism. Besides that, it also plays a key role in muscle function. In recent years, our understanding of vitamin D has expanded and we are starting to appreciate its much broader role in areas such as the immune system, cancer and cardiovascular disease. Continue reading