The New York Times has an excellent article outlining the current Vitamin D craze, it’s roots and it’s myths. I have discussed this with a medical professional, who mentions that for people with certain diseases, like osteoporosis or kidney disease, a real deficit in Vitamin D is possible. But for most people, it’s just not an issue. And because the craze has insurance companies declining to cover the testing in many cases, these patients with real need are getting their tests turned down by the companies. As the NY Times article points out, the wide scale studies are not backing up the medical professionals who set this whole fad in motion.