400 IU Vitamin D for UK adults with COVID is based on a RTI study biased by infants - Jan 2021

Editorial: Vitamin D and COVID-19 in older age: evidence versus expectations

British Journal of General Practice, January 2021
" Although recently updated meta-analytic evidence continues to suggest a modest protective effect against acute respiratory infections for a daily vitamin D dose equivalent of 400–1000 international units (IU) (odds ratio 0.70; 95% confidence interval = 0.55 to 0.89),13

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Reference 13 follows:

Vitamin D supplementation to prevent acute respiratory infections: systematic review and meta-analysis of aggregate data from randomised controlled trials

Nov 2020 preprint, not peer reviewed
David A Jolliffe et al

 Download the preprint PDF from VitaminDWiki

This preprint had so many errors that it was not included in VitaminDWiki
That it ignored with weight/age of the participants was just one of many problems


The editorial authors claim that there have been no trials completed - but there have been

COVID-19 treated by Vitamin D - studies, reports, videos

As of Jan 31, 2024, the VitaminDWiki COVID page had:  19+ trial results,   37+ meta-analyses and reviews,   Mortality studies   see related:   Governments,   HealthProblems,   Hospitals,  Dark Skins,   All 26 COVID risk factors are associated with low Vit D,   Fight COVID-19 with 50K Vit D weekly   Vaccines   Take lots of Vitamin D at first signs of COVID   166 COVID Clinical Trials using Vitamin D (Aug 2023)   Prevent a COVID death: 9 dollars of Vitamin D or 900,000 dollars of vaccine - Aug 2023
5 most-recently changed Virus entries

Many clinical trials are underway which are testing Vitamin D to fight COVID-19

The ones with shading have reported
COVID-19 RCTs


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