Hip bone loss is attenuated with 1000 IU but not 400 IU daily vitamin D3: a 1 year double-blind RCT in postmenopausal women
Journal of Bone and Mineral Research, 04/15/2013Macdonald HM et al.
The aim of this study was to determine whether daily oral vitamin D3 at 400 IU or 1000 IU compared with placebo affects annual BMD change in postmenopausal women in a 1–year double blind placebo controlled trial in Scotland. The discordance between the incremental increase in 25(OH)D between the 400IU and 1000 IU vitamin D and effect on BMD suggests that 25(OH)D may not accurately reflect clinical outcome, nor how much vitamin D is being stored.
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