If theres one star that emerges from this pandemic, it might not just be Dr. Anthony Fauci, but the under-appreciated vitamin D. And while you still need to wear a mask and practice social distancing to avoid exposure to the virus, experts are recommending taking a daily dose of D to be your healthiest now.
This nutrient has been making headlines during the COVID-19 crisis since emerging research showsa link between vitamin D deficiency and the worst of COVID-19 cases.Patients with vitamin D deficiency have the worst outcomes, which hasspurredthe public to starttaking huge doses of D supplements and cause other health complications, from nausea to kidney failure, doctors warn. So how much D is the right amount, and can you get it from sunshine or do you need a daily supplement? Here is the scoop on your D needs.
Vitamin D is making headlines because your body needs it and can't get enough of it on a normal diet. Vitamin D is a hormone-like, fat-soluble vitamin responsible for regulating your bodys uptake and use of calcium, promoting bone mineralization, and supporting a healthy immune function, says Whitney English, M.S., R.D.N., dietitian, and NASM certified personal trainer in Los Angeles.
While calcium absorption is one of its biggest roles, so, too, is the role it plays in the immune system, and for that, vitamin D does two things, adds Elroy Vojdani, M.D., functional medicine pioneer and founder of Regenera Medical in Los Angeles.
First, it boosts the "innate immune system," which is your bodys built-in primary defense against bacterial infections and viruses. Secondly, it enhances the function of dendritic cells, which chomp up bacteria and viruses and present them to be added to the immune system in a processcalled adaptive immune function, which creates antibodies to new threats.
Overall, vitamin D, which is known as a signaling hormone, will boost immune function in the first line of defense and then balance the immune system overall, Vojdani says. This is one reason people with optimal vitamin D status have fewer viral and bacterial infections, English adds. It's also why those with deficiency end up in the worst position when a new virus such as COVID-19 comes along since their immune systemsgo into overdrive trying to fight it off.
Humans are designed to produce vitamin D in their bodies by absorbing sunlight. Yet whether you should seek to get unprotected sun exposure or protected sunlight (through a window) is a controversial topic, says Vojdani. Most people are safe to get unprotected sun for 10 to 20 minutes a day, which is all your body needsto get the recommended daily amount.
The Mayo Clinic recommends that adults get at least the RDA of 600 IU. However, 1,000 to 2,000 IU per day from a supplement is generally considered safe and may have benefits. More than that though, and you risk overdosing.
And while you can get vitamin D from food, theamounts in most food is inadequate to make up the recommended dose. Very few foods naturally contain vitamin D, English says. With the exception of UV-treated mushrooms and fortified plant milk, vitamin D is found in egg yolks, cheese, cod liver oil, beef liver, and fatty fish like tuna, salmon, sardines, herring and mackerel. But the amount of vitamin D in these foods is quite small and if you're following a plant-based diet, you are not eating these at all.
That leaves supplements, as the bestviable option. Vitamin D supplements are just as effective at raising blood levels of active vitamin D as food or sunshine, English says.
Given vitamin Ds impact on the immune system, it makes sense that its snagged headlines through this pandemic. Vitamin D represents an inexpensive and potentially powerful way to help balance the immune system and boost its function, and it has particular application with COVID-19, Vojdani says.
The reasons for the confusion lies in a fact that a lackof D causes the body to go into what's known as immunity overdrive:By analyzing publicly available patient data from around the globe,VadimBackman and his team at Northwesterndiscovered a correlation between vitamin D levels and cytokine stormthe hyperinflammatory condition caused by an overactive immune system that causes severe damage to the lungs and respiratory distress that can lead to death.
Observational studies seem to agree that theres a risk if you have a deficiency. Patients with vitamin D deficiency are more likely to suffer from serious cases of the illness, English says, adding that this doesnt mean that taking supplementary vitamin D when your levels are optimal will result in any added benefit. Too much vitamin D can lead to toxicity which at the extreme can lead to calcification of the heart and blood vessels.
Figuring out how to tackle your vitamin D needs starts with knowing what your vitamin D status is. Thats why you should get your vitamin D levels checked (its a simple blood test) to determine if youre getting enough D from sunlight and your diet, English says.
While theres controversy about optimal vitamin D blood levels, Vojdani believes the general population should be somewhere between 40 and 60 nanograms per milliliter (ng/mL). Somebody with an autoimmune disease or an individual who might have problems defending against viruses should shoot for 60 to 80 ng/mL, but anything above 100 or 120 ng/mL is too high. If youre low, your doctor will most likely recommend a supplement and then recheck your levels in a few weeks.
Because vitamin D deficiency is so widespread, even in sunny spots like southern Californiait means low levels arenotdueto lack of sunlight, Vojdani says its reasonable to supplement, especially during the COVID-19 pandemic. As we make our way to the other end of this pandemic, vitamin D3 should maintain itself as a staple supplementation for the majority of people because I dont think this is our last rodeowith a viral pandemic, he says.
English recommends choosing a supplement with a dosage in line with the RDA which is 600 to 800 IU per day and avoiding high-dose supplements of over 2000 IU. Choose D3 over D2 "Most studies show D3 is more effective at raising blood levels of calcifediol, the active form of vitamin D, Vojdani says. So look for vegan-friendly D3 derived from lichen, a type of microorganism, versus sheepskin.
So what about sunlight? Excessive sun exposure can up your risk of skin cancer, and while these experts recommend supplementation over sunlight, youll have to weigh your risks.
If youre light-skinned and have a significant family history of skin cancer, or have already had it once, you should avoid sun exposure, Vojdani says.For people with darker skin or who have a low risk for skin cancer-that doesnt mean sunning yourself is risk-free. Although obtaining vitamin D through sunshine is how the body is designed, humans are different than they used to be, he adds. People are living longer, and because skin cancer is a cumulative risk, the more you are exposed, the more your lifetime risk goes up.
No matter how you get Vitamin D, just remember that it isnt a silver bullet against experiencing complications from the COVID-19 virus. The best way to avoid COVID-19 is by following safety guidelines, especially by wearing protective face coverings and social distancing, English says.
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Here's the Right Level of Vitamin D to Protect You from COVID-19 - The Beet
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