COVID-19: Is Vitamin D Supplementation Important?

 Vitamin D has long been touted for its health benefits, but now there’s more evidence that it could be beneficial in protecting against COVID-19. Studies have found that people with low levels of vitamin D are more likely to experience severe symptoms from the virus, and supplementation may help to reduce the risk. But what does this mean for those of us who are already taking vitamin D supplements? Is it still recommended? In this blog post, we will explore the evidence behind vitamin D supplementation and its potential role in battling COVID-19.

COVID-19: Is Vitamin D Supplementation Important?

Introduction to COVID-19 and Vitamin D

 COVID-19 has undoubtedly raised awareness in the world of the role that Vitamin D may play in strengthening our immune system. As we continue to face this unprecedented time, it is more critical than ever to unpack what we know about Vitamin D supplementation as a way to boost our health, both in the present and looking to the future. Herein we explore the link between Vitamin D and COVID-19 by drawing attention to why this important nutrients has unearthed such interest.

The Role of Vitamin D in the Immune System

 Its active form has a vital job supporting the immune system. It fine-tunes the activity of immune cells, including the T cells and macrophages that protect against infections and promote general wellbeing.

 In much the same way that sunlight stimulates our skin to make vitamin D, thus bolstering the first line of defence against foreign invaders, when we inhale endogenously produced nitric oxide, we also fortify the innate immune system – in this case, by increasing the production of antibiotic peptides.

 Moreover, most of the studies conducted in this evidence class suggest that vitamin D also leads to reduced inflammation throughout the body, which can help to reduce the risk of chronic inflammation over time, which impairs immune function. Suboptimal levels of vitamin D are associated with increased susceptibility to infections and common autoimmune disease.

 To keep your immune system vitamin D-fortified against such diseases as COVID-19, you have to make sure you have enough vitamin D. 

Studies on the Relationship between Vitamin D and COVID-19

 The connection between levels of Vitamin D and COVID-19 has recently been studied, and it seems that being deficient can have a role in how we react to the virus. With studies showing that it plays a vital role in the immune system, especially in preventing severe infections, it is of no surprise that Vitamin D may also affect the way the body acts against a virus. This can in turn reduce the risk of serious illness of COVID-19.

 There is no hard-and-fast proof yet that Vitamin D has any therapeutic effect in COVID-19 cases, although early studies are encouraging, and it’s very clear that vitamin D deficiency is common throughout the world. Certain demographic groups, such as the elderly and people with darker skin tones, or those with less time outdoors, are especially at risk for this deficiency.

 During these times, getting enough Vitamin D through sunlight exposure or supplements could contribute to keeping our immune systems up to snuff. Do consult your provider before making major changes to your daily supplement regimen. 

Recommended Vitamin D Intake for COVID-19 Prevention

 The right level of Vitamin D is also important for a robust immune system, which is particularly relevant to our current COVID-19 cohort, and daily dosages of 1000-4000 IU are likely to keep many people within a healthy range. Of course, everyone’s requirements are individual, so it is sensible to consult vitamin checking services or your health care practitioner about the dose that’s right for you. 

 Vitamin D is generated from sunlight exposure, from fortified foods such as dairy products and cereals, and from supplements. Because of the lockdown, many people increasingly spend more time indoors. It gets harder to get sufficient sunlight exposure and so supplementation with vitamin D becomes even more important.

 The best way to fill this gap is by supplementing Vitamin D-rich foods into your diet or taking a supplement. Properly supporting immune health is just one step toward staying healthy through the Covid crisis. 

How to Get Enough Vitamin D During Lockdown

 It’s more important than ever going into the COVID-19 pandemic to make sure your vitamin D levels are adequate, certainly supplementing your diet with an extra dose of D and ideally getting at least 15 minutes of daily sunlight on your skin. But just how much vitamin D do you need during the COVID-19 pandemic, and how much is too much? The current standard for sufficient vitamin D levels is considered 20 nanograms (or 50 nanomoles) per millilitre in the bloodstream. Higher doses, however, which (as we’ve just discussed) might lead to better protection against COVID-19 infections, can be associated with kidney damage and other complications – especially if blood levels exceed 75 nanograms per millilitre. Don’t take my word for it! It’s important to take any new regimen of supplements with the blessing of your physician. 

 Especially if you’re lacking sunlight exposure during lockdowns, or for other times when your sun time is limited, the extra effort of getting sufficient vitamin D could be worthwhile. Consider increasing your intake of vitamin D-rich foods such as fatty fish, fortified dairy foods, and egg yolks, and speak with your doctor about taking a supplement if needed. 

 Vitamin D supplementation or an adequate diet representing good levels of vitamin D (say, 30 ng or higher, and certainly in excess of 20 to 25 ng) represents an investment in your health and continued hale wellbeing in these challenging times – keep well! 

How much Vitamin D should be taken?

Given that there’s still much about the coronavirus and how to prevent its spread that’s not understood, many experts are emphasising the need to ensure you get enough vitamin D in order to boost your immune system, but just how much? The recommended daily allowance is 600IU for vitamin D for adults, although many experts currently recommend 1000-2000IU during the months when you are less likely to get enough sunlight – my doctor is researching whether a winter boost might be reassuring. A simple blood test measures these, so ask your doctor to check these levels in you, even if you are feeling fine.


In summary, Vitamin D supplementation might help individuals who are already infected with COVID-19. As promising as that may seem, as of right now the research on this topic remains inconclusive. Moreover, even if this link is never proven, Vitamin D is still good for you in a number of ways. If you’re deficient, supplementation might help to provide a bit of added protection against the virus; either way, having regular intake of the vitamin can help your body function more optimally and keep you feeling your best – which is something we can all appreciate while living through these difficult times.