Vitamin D, commonly called the sunshine vitamin, is essential for the development and maintenance of a healthy skeletal system.1-3 It is involved in bone formation, resorption and mineralization as well as maintaining neuromuscular function.3

Initially it was thought that the effects of vitamin D were restricted to skeletal health.4-6 We now know that vitamin D is involved in many other biological processes.2,3,6-9

Many cells and organs have a vitamin D receptor (VDR) and thus a vitamin D response element.2,3,10 Some of these include the heart, brain, colon, prostate, pancreas and breasts.3,6,7,9,11,12