Graphic below borrowed from a post on pinterest, but it gives a little overview of the importance of vitamin D. Notice that it says that 50- 90% of pepole are deficient!!  Vitamin D is responsible for regulating the immune system and the nervous system.  It helps boost the immune system especially during the cold and flu season when our exposure to the sun is minimal to none.  It helps regulate seratonin, improves chronic fatigue, anxiety, and depression.  It promotes bone health and helps protect against cancer and other diseases.  This is just to name SOME of the benefits!!