Vitamin D Deficiency Clinical Trial
Official title:
Randomized Controlled Trial to Explore the Inter-relationship Between Vitamin D Requirements and Calcium Intake
This winter-based placebo-controlled, single-dose vitamin D randomized controlled trial (RCT) aims to examine the impact of various levels of habitual calcium intake on dietary vitamin D requirements in older adults stratified by calcium intake. This will provide new data on the impact of different levels of calcium intake, ranging from low/moderate to high, on winter serum 25(OH)D levels, and their utilization and catabolism in adults.
The aim of this study is to perform a randomised controlled vitamin D3 intervention study in
apparently healthy, free-living adults (aged 50+ y) to investigate whether different levels
of habitual calcium intake, ranging from low-moderate to high, influence serum 25(OH)D
concentrations and indices of vitamin D activation and catabolism during winter, when
vitamin D intake is adequate versus inadequate.
This research will provide new data and scientific understanding in relation to the impact
of different levels of dietary calcium intake on vitamin D requirements in the older adult
population. As such, this new data will inform dietary reference values for vitamin D.
;
Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Prevention
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