Below is a link to a very well researched and documented info on Vitamin D. http://www.grc.com/health/Vitamin-D.htm The info is free, vitamin d is cheap, and its something we aren't getting from food or exposure to sunlight, reguardless of what your mother told you. Steve To subscribe or to leave the list, or to set other subscription options, go to www.freelists.org/list/real-eyes