Conflict of interest: The authors declare no conflicts of interest.
Ultraviolet radiation exposure and serum vitamin D levels in young children
Article first published online: 18 JUN 2014
© 2014 The Authors. Journal of Paediatrics and Child Health © 2014 Paediatrics and Child Health Division (Royal Australasian College of Physicians)
Journal of Paediatrics and Child Health
Volume 50, Issue 9, pages 713–720, September 2014
How to Cite
Ramankutty, P., de Klerk, N. H., Miller, M., Fenech, M., O'Callaghan, N., Armstrong, B. K. and Milne, E. (2014), Ultraviolet radiation exposure and serum vitamin D levels in young children. Journal of Paediatrics and Child Health, 50: 713–720. doi: 10.1111/jpc.12657
Funding: This study was funded by the National Health and Medical Research Council (NHMRC) (Project Grant number: 572623). Elizabeth Milne was supported by an NHMRC Career Development Award.
- Issue published online: 25 AUG 2014
- Article first published online: 18 JUN 2014
- Manuscript Accepted: 12 MAR 2014
- National Health and Medical Research Council (NHMRC). Grant Number: 572623
- NHMRC Career Development Award
- child health;
- vitamin D
Health benefits of adequate vitamin D levels in the blood include better bone health and a reduced incidence of a range of chronic diseases and infections. Ultraviolet (UV) radiation exposure from the sun is the main source of vitamin D; however, such exposure, especially from a young age, is also a potential risk factor for skin cancer. The current study examined the association of UV exposure with vitamin D production in young children to determine the period of weekly exposure prior to blood testing that affected serum 25-hydroxyvitamin D (25(OH)D) levels.
Between 2009 and 2011, healthy children aged 3, 6 and 9 years were recruited from the community for a cross-sectional study of nutritional factors and DNA damage. Parents of 464 children provided information on the children's average weekly sun exposure and level of sun protection during each of the 16 weeks before blood sample collection by a domiciliary phlebotomist.
Serum 25(OH)D levels were best predicted from UV exposure during the week before blood collection for samples drawn in autumn, summer or spring. For samples drawn in winter, serum 25(OH)D levels were best predicted by UV exposure during the 2 weeks before blood collection.
Consistent weekly sun exposure may be beneficial for young children, especially in winter, to maintain healthy vitamin D levels in the blood. However, confirmation of these results is needed before their public health significance can be fully evaluated.