Can vitamin d give athletes an edge? new trial investigates
NCT ID NCT07641075
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study gives 200 athletes either high-dose vitamin D3 (4,000 IU daily) or a placebo for 4 to 8 weeks. Researchers measure changes in vitamin D levels, hormones, muscle function, cognitive performance, and body composition. The goal is to see if extra vitamin D improves athletic and mental performance in well-trained individuals.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Vitamin D3 (cholecalciferol)
What this could lead to
If it works, this could show that vitamin D boosts athletic performance, cognitive function, and body composition in trained athletes.
What could go wrong
This is a small, early-stage study in healthy athletes, so results may not apply to the general public. High-dose vitamin D can cause side effects like high calcium levels, though 4,000 IU is generally safe.
Disclaimer
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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.
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.
Contacts and locations
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Study contacts
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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The Jerzy Kukuczka Academy of Physical Education in Katowice
RECRUITINGKatowice, Mikołowska 72a, 40-065, Poland
Contact Phone: •••-•••-•••• Email: •••••@•••••