Do you have a deficiency to Vitamin D? Many doctors report that most people today do. Why is that? It may be as simple as the fact that we do not get outside enough to soak up the sun's rays – the best access to this source of nutrients. There are many reasons for this deficiency. But, what is important to know is that the deficiency itself can lead to complications with other components of your health including hair loss. How does Vitamin D deficiency directly impact hair loss, specifically alopecia?