Footballers get mega vitamin d dose in exercise study

NCT ID NCT07310329

First seen Jan 07, 2026 · Last updated Jun 23, 2026 · Updated 28 times

Summary

This pilot study gave 20 professional football players either a single high dose of vitamin D or a placebo before a match. Researchers measured how vitamin D levels changed in their blood. The goal was to see how exercise affects vitamin D metabolism, not to treat any disease.

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Contacts and locations

Locations

  • Wroclaw University of Health and Sport Sciences

    Wroclaw, Dolnyśląsk, 51-612, Poland

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 successful, this could help understand how exercise and vitamin D interact in athletes, possibly guiding future supplementation strategies.

What could go wrong

This is a very small pilot study in healthy athletes, not designed to test health outcomes. Results may not apply to the general population.

Conditions

The condition(s) this trial relates to.

vitamin D deficiency

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.