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Is vitamin D deficiency a public health concern for low middle income countries? A systematic literature review

  • Kevin D. CashmanEmail author
  • Tony Sheehy
  • Colette M. O’Neill
Original Contribution

Abstract

Purpose

Vitamin D deficiency has been receiving increasing attention as a potential public health concern in low and lower-middle income countries (LMICs), of which there are currently 83. We aimed to conduct a comprehensive systematic literature review (SLR) of available data on vitamin D status and prevalence of vitamin D deficiency in all 83 LMICs.

Methods

We followed the general methodology for SLRs in the area of serum 25-hydroxyvitamin D. Highest priority was placed on identifying relevant population-based studies, followed by cross-sectional studies, and to a lesser extent case-control studies. We adopted the public health convention that a prevalence of vitamin D deficiency (serum 25-hydroxyvitamin D < 25/30 nmol/L) at > 20% in the entire population and/or at-risk population subgroups (infants, children, women of child-bearing age, pregnancy) constitutes a public health issue that may warrant intervention.

Results

Our SLR revealed that of the 83 LMICs, 65% (n = 54 countries) had no published studies with vitamin D data suitable for inclusion. Using data from the remaining third, a number of LMICs had evidence of excess burden of vitamin D deficiency in one or more population subgroup(s) using the above convention (Afghanistan, Pakistan, India, Tunisia and Mongolia) as well as possibly other LMICs, albeit with much more limited data. Several LMICs had no evidence of excess burden.

Conclusion

Vitamin D deficiency is a public health issue in some, but certainly not all, LMICs. There is a clear need for targeting public health strategies for prevention of vitamin D deficiency in those LMICs with excess burden.

Keywords

Vitamin D deficiency Serum 25(OH)D Low and lower-middle income countries Systematic review Food fortification  FAO food balance sheets 

Notes

Compliance with ethical standards

Conflict of interest

The authors wish to confirm that there are no known conflicts of interest associated with this publication.

Supplementary material

394_2018_1607_MOESM1_ESM.docx (188 kb)
Supplementary material 1 (DOCX 188 KB)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Cork Centre for Vitamin D and Nutrition ResearchUniversity College CorkCorkIreland
  2. 2.School of Food and Nutritional SciencesUniversity College CorkCorkIreland
  3. 3.Department of MedicineUniversity College CorkCorkIreland

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