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Principal Investigator
Barry Graubard
About this CDAS Project
PLCO (Learn more about this study)
Project ID
Initial CDAS Request Approval
Jun 20, 2008
Predictors of Vitamin D status (as measured by 25(OH)D in serum) : in particular BMI, Exercise and Dietary intake and Season
There are two requirements for adequate vitamin D status to be maintained when there is seasonal variation in vitamin D input. One of these is for the skin to receive sufficient exposure to solar UV light in summer, to raise the reserves of 25(OH)D. The second requirement is for an efficient mechanism to allow 25(OH)D reserves to be available during the months of winter. Our overall hypothesis is that exercise is an independent risk factor for vitamin D status and is particularly important in the winter months, independent of BMI and dietary intake of vitamin D. The strategy that will be followed to test this proposal will be an investigation of the influence of physical exercise, dietary vitamin D and BMI on the maintenance of vitamin D status (i.e., 25(OH)D levels) in a non elderly human population (PLCO cohort) along with known confounders.

The specific aim of this proposal is to investigate predictors of vitamin D status in humans in particular the specific aim is to investigate the the relationship between
1. Exercise and 25(OH)D levels
2. BMI and 25(OH)D levels
3. Dietary vitamin D sources and 25(OH)D


David Fraser (DCEG, NCI)
Wen-Yi Huang (University of Sydney, Australia)
Kaye Brock (University of Sydney, Australia)
Rebecca Mason (University of Sydney, Australia)

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