RT Journal Article SR Electronic A1 Buckley, Rita T1 Lower Doses of Vitamin D Can Prevent Bone Fractures in Older Women with Vitamin D Insufficiency JF MD Conference Express YR 2011 FD SAGE Publications VO 11 IS 5 SP 10 OP 10 DO 10.1177/155989771105004 UL http://mdc.sagepub.com/content/11/5/10.1.abstract AB The first dose response study on multiple doses of vitamin D shows that older Caucasian women need less vitamin D to prevent vitamin D insufficiency than previously thought. This article presentes findings from the Vitamin D Response Study: Effect on Serum 5-Hydroxyvitamin D and Parathyroid Hormone trial, a randomized, double-blind, placebo-controlled trial that involved healthy Caucasian postmenopausal women.