5/n Sounds good right? Well, some issues Firstly, sample size: it was VERY SMALLpic.twitter.com/kq4XeuicBv
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How come your posts always end up implicitly asking for money for more research?

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Jokes apart, thank you for your publc unraveling of many studies. (and for your own)
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Well, this study made me entertain the possibility of Vit D as a possible candidate to 'malnourishment biomarker'
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One serious question. Is that the typical level of papers found in good journals? Coming from a much more rigid background, the only word that can describe my current state (not just for this paper): dumbfounded.
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Typical? Probably not. Most papers in good journals are decent. But even the better journals let a few bad papers through, some of them really bad. Also, PLOS is a bit notorious for low quality studies, so not sure if I'd say it's a 'good' journal
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Agreed, we need much more research on this. On flip side: 1) Why be insufficient when it also has these benefits? https://www.bmj.com/content/356/bmj.i6583 … 2) why wouldn't you want to reduce risk of infection & severity of RTIs while COVID about? 3) it's cheap 4) study with weak power supports it
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Oh dear. One of the authors is Holick. Color me surprised. Nonetheless I'm interested to hear what
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It’s also the case that low D is associated with just about every measure of ill-health you can think of, however D supplements increase D levels without improving whatever underlying condition you are studying
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The most barn-door confounder with Vit D is ethnicity.
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Ethnicity maybe less strongly linked to Vit D in Iran as Azeris & Afghani (immigrants) aren't necessarily darker than Persians. However skin colour is correlated with socioeconomic status (darker tend to be poorer) so absence of adjustment for SE status is a problem.
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