Association Between Covid-19 And Vitamin D Levels

Last Updated: December 9, 2020

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This Briefing Note was completed by the Research, Analysis, and Evaluation Branch (Ministry of Health) in collaboration with McMaster Health Forum, a member of the COVID-19 Evidence Synthesis Network. Please refer to the Methods section for further information


This note summarizes research evidence on the association between COVID-19 and individuals’
Vitamin D levels.

*The full version of the Briefing Note including the Research Findings and Appendix can be accessed in the PDF file at the top of the page*

Key Findings

Analysis for Ontario: No findings identified.

Implementation Implications: The current status of research supports the role of Vitamin D supplementation in preventing or ameliorating the severity of COVID-19, but further clinical studies are needed.


The COVID-19 Evidence Synthesis Network is comprised of groups specializing in evidence synthesis and knowledge translation. The group has committed to provide their expertise to provide high-quality, relevant, and timely synthesized research evidence about COVID-19 to inform decision-makers as the pandemic continues. The following member of the Network provided an evidence synthesis product that was used to develop this Evidence Synthesis Briefing Note:

  • Wilson MG, Mansilla C, Lavis JN. COVID-19 rapid query response #4: What’s known about vitamin D deficiency as a prognostic factor for COVID-19? Hamilton: McMaster Health Forum, 7 December 2020.