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Impact of season of VitD repletion on serum 25(OH)D concentration at baseline, repletion-end and post repletion. Winter VitD repletion is associated with significantly lower end of repletion serum 25(OH)D concentrations compared with repletion during the other seasons. Baseline and post-repletion serum 25(OH)D are not dependent on the season of repletion. ***P < 0.0001.
