Immune Education Series: Sunshine & Vitamin D vs Infection

illustrated by Aaron McMichael, DC

As with other viruses, research indicates coronavirus is more likely to cause harm in those patients with low levels of vitamin D, and sun or UV light is an effective method of disinfecting and killing the virus. How does the sun relate to vitamin D levels and why does it seem to help against coronavirus and other viruses?

Research on Vitamin D and Coronavirus
Several studies around the world have been published that demonstrate a link between low levels of vitamin D and increased risk of severe illness from coronavirus. These studies have shown a link across large populations as well as individuals that have been infected. These results are consistent with prior research that has shown vitamin D plays a role in protecting against acute respiratory infections. Coronavirus treatment protocols in some hospitals have included vitamin D supplementation with other procedures and medications to combat the infection.

Researchers believe that vitamin D exerts a positive effect on modulation of our immune system in multiple ways. One of these ways may include its relationship with macrophages which are special cells that locate and “eat” microbes found in our body. Another way is reducing an excessive inflammatory response of the immune system. Others acknowledge the value of vitamin D but believe that the positive effects of vitamin D on coronavirus infection may relate more to its wide-ranging benefits on reducing chronic diseases.

Let the Sun Shine on Coronavirus
Hospitals have used UV light emitting technology for years to disinfect rooms or equipment. It damages a virus’s genetic material and their ability to replicate. The coronavirus pandemic has generated increased interest and research into the effects of sunshine and UV light on disinfection. The results of a recent experiment at the National Biodefense Analysis and Countermeasures Center in Maryland noted sunlight reduced the life of coronavirus (airborne or on surfaces) from hours to a few minutes.

Utilizing the Benefits of Sunshine and Vitamin D to Reduce Coronavirus Risk
Considering the research noted above, sunshine can help us in two important ways. Exposure to sun helps disinfect areas with coronavirus, whether it be in the air or on surfaces. Sun exposure also is our primary method of vitamin D production. It is hard to obtain enough vitamin D from our food alone, so sun exposure or supplementation is necessary to increase our vitamin D to a healthy level. Spend time outdoors with sun on a significant portion of the skin until the skin starts to appear a little rosy. Those living in Northern areas and those with darker skin tones require more time outside for vitamin D production. Avoid sunburns which can increase the risk of cancer. Unless one takes high doses of vitamin D for a prolonged period, the risk of toxicity is low. The low risk and high potential for benefit makes increasing vitamin D a reasonable strategy to reduce your risk with coronavirus or other respiratory infections.

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