Vitamin D presents many dilemmas and controversies. Even the experts cannot agree on the answers to these simple questions: How much to take? What level constitutes a deficiency? What does Vitamin D deficiency cause? This article starts to put some of the pieces to the Vitamin D puzzle together. More information will become available as the FDA changes the recommend daily allowance of Vitamin D which now stands at 400 IU; but that number is going to go up by at least double in the near future. Stay tuned and stay informed.