- Marlo Rapp
How Vitamin D May Help Protect Against the Coronavirus (COVID-19)
Updated: Nov 30, 2022
“We believe, that we can advise Vitamin D supplementation to protect against SARS-CoV2 infection.”
Vitamin D plays many critical roles in our health, including:
Supports immune system health
May reduce risk of the seasonal flu
Supports respiratory health
Regulates insulin levels and supports the management of diabetes
Supports lung function and cardiovascular health
May help prevent the development of eczema, asthma, and other allergic diseases in children
Promotes absorption of calcium
Builds and maintains healthy teeth and bones
Influences the expression of genes involved in the development of cancer
May reduce symptoms of depression and anxiety
May promote healthy pregnancy and delivery
Supports brain and nervous system health
May naturally boost testosterone
May help improve energy and athletic performance
May help support restful sleep
May suppress appetite and boost weight loss
If that wasn’t reason enough to make sure you are getting adequate levels, emerging research has found a relationship between the severity of symptoms and mortality rates of coronavirus and vitamin D.

Countries lacking sufficient sunlight for adequate vitamin D levels and countries with widespread vitamin D deficiency in general are seeing higher mortality rates due to the coronavirus (COVID-19). Furthermore, in a scientific review of more than 11,000 people from 14 countries, researchers found that adequate vitamin D levels was associated with at least a 12% decrease in risk of acute respiratory infection related to COVID-19. This comes as no surprise given the impact vitamin D has on immune and respiratory functioning, as well as overall health.
It is important to note that it becomes more difficult for the human body to synthesize vitamin D as we age. This can be made even more difficult when coupled with obesity, poor diet, irritable bowel syndrome, and/or insufficient sun exposure. If you think you might be deficient, you can get your vitamin D levels checked by your doctor.
Symptoms of vitamin D deficiency include:
Getting sick often
Low bone density
Hair loss
Depression
Feeling tired or fatigue
Back, bone, and/or muscle pain
Impaired wound healing
Thankfully, there are many ways you can boost vitamin D naturally, including:

Exposure to Sunlight
Cod Liver Oil (also contains Vitamin A & Omega 3 fatty-acids)
Salmon
Trout
Sardines
Herring
Beef Liver
Egg Yolks
Cow’s Milk
Canned Tuna
Mushrooms (Wild or Treated with UV Light)
High Quality Supplementation
Always follow recommended dosing, and consult with a physician or nutritionist.
*Visit the NIH website for recommended daily intake of vitamin D based on age, gender, and other factors: https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/
References:
https://onlinelibrary.wiley.com/doi/full/10.1111/apt.15777
https://www.healthline.com/nutrition/vitamin-d-coronavirus#does-it-protect-against-covid-19
https://www.researchsquare.com/article/rs-21211/v1
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