Vitamin d duel: does a higher dose ward off COVID?
NCT ID NCT07128069
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at whether taking a moderate dose (4,000 IU) of vitamin D daily could lower the chance of getting COVID-19 compared to a low dose (400 IU). Over 2,000 adults in the US took part for 12 months. The goal was to see if vitamin D can help prevent COVID-19 infection.
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
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Locations
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University of Chicago
Chicago, Illinois, 60637, United States