People have been tagging me a lot in Vitamin D for COVID-19 articles, and as far as I can tell the evidence is still pretty much what it was when I wrote this months ago:https://medium.com/the-method/should-you-take-a-vitamin-d-supplement-for-covid-19-63d922f24953 …
Well, that review showed that if you treat 100 people with daily vit D for a year, and 100 people without, about 30% of the people who get vit D will have one respiratory infection in 12 months, and about 33% of the control will
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However, if you split it up into upper and lower respiratory tract infections, there's no benefit. Also no benefit to hospital admission, death, work absence, or any other outcomes
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So no benefit for the type of infection that COVID-19 is, and no benefit for any outcomes that we actually care about (i.e. death) So why would it be evidence that we should use vit D supplements?
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But surely you wouldn't advocate people are insufficient in a vitamin helpful to immune function right now? Particularly when there are indications it could be beneficial to RTIs, and COVID, and also to mental health, which lets face it has been suffering for many during COVID
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I agree we should be clear on what the evidence is saying, but I think we should be careful not to throw the baby out with the bathwater on this
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