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Irish Journal of Medical Science (1971 -)

, Volume 183, Issue 3, pp 485–487 | Cite as

The double-edged sword of vitamin D in Ireland: the need for public health awareness about too much as well as too little

  • M. T. Kilbane
  • M. O’Keane
  • M. Morrin
  • M. Flynn
  • M. J. McKenna
Brief Report

Abstract

Introduction

The Institute of Medicine (IOM) 2011 on dietary references intakes for calcium and vitamin D specified that a 25-hydroxyvitamin D (25OHD) level below 30 nmol/L indicated risk of deficiency and that a level above 125 nmol/L indicated risk of harm.

Methods

We noted a high prevalence of hypovitaminosis D (23.9 %) and a substantive prevalence of hypervitaminosis D (4.8 %) in a retrospective audit of clinical samples (n = 10,181) obtained over 10 months in 2013.

Conclusion

Hypovitaminosis D should be corrected by low dose supplementation (5 µg or 200 IU daily) with some at-risk groups needing higher doses (10 µg or 400 IU daily) based on 25OHD levels. Whereas, those taking high-dose vitamin D supplements based on mistaken beliefs about recently authorised claims of benefit for muscle function and misleading unauthorised claims need to be alerted to the potential harms of excessive supplementation.

Keywords

Vitamin D Institute of Medicine Audit 

Notes

Conflict of interest

Dr. Kilbane has nothing to disclose.

References

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Copyright information

© Royal Academy of Medicine in Ireland 2014

Authors and Affiliations

  • M. T. Kilbane
    • 1
  • M. O’Keane
    • 1
  • M. Morrin
    • 1
  • M. Flynn
    • 2
  • M. J. McKenna
    • 1
    • 3
  1. 1.Metabolism LaboratorySt. Vincent’s University HospitalDublin 4Ireland
  2. 2.Food Safety Authority of IrelandDublin 1Ireland
  3. 3.School of Medicine and Medical ScienceUniversity College DublinDublin 4Ireland

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