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Probiotics for sharper thinking? new study tests the hype

NCT ID NCT07504952

Knowledge-focused Sponsor: Loughborough University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Sep 11, 2026 · Updated 2 times

Summary

This study looked at whether taking a daily probiotic supplement for 8 weeks can improve thinking, memory, and digestion in generally healthy adults. 85 participants were randomly assigned to receive either probiotics or a placebo. Researchers measured cognitive lapses, gut symptoms, mood, and drinking/eating behaviors using online questionnaires. The goal was to see if probiotics offer any real benefits for everyday wellbeing.

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

85 people

The number who actually took part.

Started

Sep 2025

Finished

Mar 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 years and older

Sex

Anyone

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.

Exclusion Criteria: * Participants under 18 years of age * Regular use of probiotics or prebiotics (in supplements or foods) within the past 4 weeks * Antibiotic use within the past 4 weeks * Chronic gastrointestinal disorders (e.g. Irritable Bowel Syndrome, Crohn's disease, etc) * Major psychiatric conditions diagnosed (e.g., bipolar disorder, schizophrenia, etc) * Current pregnancy or breastfeeding

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As listed by the trial registrant

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

Healthy adult This study focus focuses on A non-clinical sample of generally healthy adults, and whether probiotics offer any holistic health benefits

Contacts and locations

Locations

  • Loughborough University

    Loughborough, United Kingdom

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