I have been taking the Vitamin D hormone (5000 IU/day) since November 2007. I feel much healthier these days. Cedric Garland's video is well worth the watch. The science he talks about will probably be given to us in small doses (250 IU/day). I actually began taking it after reading this article by by Donald W Miller: Jr, MD. He has a plethora of articles that are worth reading. Dr D and Dr G are both well balanced individuals in my books!
Natural News has an article about kidney dialysis patients being Vitamin D deficient.
