Shedding light on vitamin D and your immune system

Vitamin D is well-known for its role in building strong bones. But increasingly, research is revealing the importance of vitamin D in protecting against a host of health problems. Serving a dual role as both a hormone and vitamin, it is the sun that is the main source of vitamin D with few foods being reliable sources of it. In this podcast, I outline the key roles played by vitamin D, profile the growing number of health areas linked to it especially as it relates to immunity, and discuss ho...