Science Daily


Vitamin D blood level for reducing major medical risks in older adults identified, study suggests (May 1, 2012) -- To resolve controversy over how much vitamin D is enough to protect older adults' health, researchers tested Cardiovascular Health Study blood samples. They sought links between each person's 25(OH)D and first heart attack, cancer diagnosis, hip fracture or death. Risks rose when levels fell below 20ng/mL or 50 nmol/L. Results match the low threshold level set by the Institute of Medicine. Association with risk varied seasonally. Levels were lower, and disease event risk higher, in winter. ... "> full story
http://www.sciencedaily.com/releases/2012/05/120501145028.htm

Journal Reference:
Ian H. de Boer, Gregory Levin, Cassianne Robinson-Cohen, Mary L. Biggs, Andy N. Hoofnagle, David S. Siscovick, and Bryan Kestenbaum. Serum 25-Hydroxyvitamin D Concentration and Risk for Major Clinical Disease Events in a Community-Based Population of Older Adults. Ann Intern Med, May 1, 2012 156:627-634 [link]