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Supplements may boost footballers' mental endurance and decision-making

NCT ID NCT07696052

Disease control Sponsor: Vizja University in Warsaw Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jul 10, 2026 · Last updated Sep 15, 2026 · Updated 11 times

Summary

This study tests whether a 14-day course of taurine, caffeine, and phosphatidylserine supplements can help professional male football players resist mental fatigue and make better tactical decisions during games. Sixty-two players from two clubs will be randomly assigned to receive either a placebo, taurine plus caffeine, or taurine plus caffeine plus phosphatidylserine. Researchers will measure changes in decision accuracy and visual search efficiency before and after the supplementation period.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Taurine, caffeine, and phosphatidylserine dietary supplements
What this could lead to
If effective, this supplement combination could help athletes maintain sharp decision-making and focus during mentally demanding games or training.
What could go wrong
This is a small, early-stage trial in a specific group (male professional football players), so results may not apply to others. Supplements may cause side effects like jitters or sleep issues.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

65 people

The number who actually took part.

Started

Aug 2026

Finished

Sep 2026

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 37 years

Sex

Male participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Male professional outfield football players aged 18 to 37 years. * First-team players or selected U19 players aged 18 years or older who are regularly integrated into first-team training. * Regular participation in club training. * At least 5 years of systematic football training experience. * Free from injury or illness limiting full participation in training and testing. * Normal or corrected-to-normal vision. * Ability to complete the laboratory and field-based testing procedures. * Written informed consent provided before participation. Exclusion Criteria: * Goalkeepers. * Current injury or illness limiting full participation in testing. * Neurological disease. * Recent concussion or head trauma. * Uncorrected visual impairment. * Use of phosphatidylserine, nootropic agents, or strong stimulants during the previous 4 weeks. * Non-standard caffeine intake on testing days. * Failure to comply with pre-test standardization procedures. * Failed eye-tracker calibration. * Loss of more than 30% of gaze data during the football-specific decision-making task. * Withdrawal of consent.

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Conditions

The condition(s) this trial relates to.

Mental Fatigue

As listed by the trial registrant

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

Athletic performance Cognitive performance Decision making Mental fatigue Soccer performance

Contacts and locations

Locations

  • Professional Football Training Center

    Lodz, Poland

  • Professional Football Training Center

    Warsaw, Poland

More trials for these conditions

Other studies related to the condition(s) this trial covers.