Centre of Expertise Urban Vitality

Seasonal variation in vitamin D status in elite athletes

a longitudinal study


<p>Studies monitoring vitamin D status in athletes are seldom conducted for a period of 12 months or longer, thereby lacking insight into seasonal fluctuations. The objective of the cur-rent study was to identify seasonal changes in total 25-hydroxyvitamin D (25(OH)D) concen-tration throughout the year. Fifty-two, mainly Caucasian athletes with a sufficient 25(OH)D concentration (>75 nmol/L) in June were included in this study. Serum 25(OH)D concentra-tion was measured every three months (June, September, December, March, June). Addition-ally, vitamin D intake and sun exposure were assessed by questionnaires at the same time points. Highest total 25(OH)D concentrations were found at the end of summer (113±26 nmol/L), whereas lowest concentrations were observed at the end of winter (78±30 nmol/L). Although all athletes had a sufficient 25(OH)D concentration at the start of the study, nearly 20% of the athletes were deficient (<50 nmol/L) in late winter.</p>

Reference Backx, E., van der Avoort, C., Tieland, M., Maase, K., Kies, A., van Loon, L., de Groot, L., & Mensink, M. (2016). Seasonal variation in vitamin D status in elite athletes: a longitudinal study. International journal of sport nutrition and exercise metabolism, 27(1), 6-10. https://doi.org/10.1123/ijsnem.2016-0177
Published by  Urban Vitality 1 January 2016

Publication date

Jan 2016


Evelien Backx
Cindy van der Avoort
Kamiel Maase
Arie Kies
Luc van Loon
Lisette de Groot
Marco Mensink

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