Vitamin D is not really a vitamin. In fact, it is a group of fat-soluble hormones that are produced in the skin when it is exposed to sunlight. Vitamin d3 is critical to many physical and mental functions. It is essential for healthy bones. It also supports the immune system, giving your body the ability to fight illness. However, nearly 30-50 percent of the general population … [Read more...] about Does Vitamin D Help You Sleep?