The Role of Vitamin D in the Covid-19 Pandemic (& more!)


Research is showing that Vitamin D may reduce the severity of COVID-19. The following is a recent excerpt from a peer-reviewed study done at the College of Physicians:


“The severity of COVID-19 is determined by the presence of pneumonia, severe acute respiratory distress syndrome, myocarditis, microvascular thrombosis and/or cytokine storms, all of which involve underlying inflammation.


A principal defence against uncontrolled inflammation, and against viral infection in general, is provided by T regulatory lymphocytes (Tregs). Treg levels have been reported to be low in many COVID-19 patients and can be increased by vitamin D supplementation.

  • Low vitamin D levels have been associated with an increase in inflammatory cytokines and a significantly increased risk of pneumonia and viral upper respiratory tract infections.

  • Vitamin D deficiency is associated with an increase in thrombotic episodes, which are frequently observed in COVID-19.

  • Vitamin D deficiency has been found to occur more frequently in patients with obesity and diabetes. These conditions are reported to carry a higher mortality in COVID-19.” *

This is only one of many studies of its kind!


Pandemic aside, Vitamin D is also very important for:

  • promoting healthy bones and teeth.

  • supporting immune, brain, and nervous system health.

  • regulating insulin levels and supporting diabetes management.

  • Anyone living with an autoimmune condition.

  • supporting lung function and cardiovascular health.

Approximately 30% of Canadians are Vitamin D deficient (even higher in the winter). Some studies have shown that number to have gone higher during the pandemic given how many people stayed indoors more than usual (= less sun exposure).


As we head into winter/cold/flu season – you should know that Vitamin D supplements protect against acute respiratory infections including colds and flu – and may also help combat symptoms of Seasonal Affective Disorder (SAD).


Vitamin D is a fat-soluble vitamin and can “build up” in your system – so always take with food, and do speak with your healthcare practitioner about how to safely supplement with Vitamin D.


* Research Study: Does vitamin D deficiency increase the severity of COVID-19?