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.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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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
Locations
-
The Jerzy Kukuczka Academy of Physical Education in Katowice
RECRUITINGKatowice, Mikołowska 72a, 40-065, Poland
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