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Yogurt vs. milk: which boosts your brain and bowels?

NCT ID NCT06311097

Knowledge-focused Sponsor: University of Copenhagen 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026

Summary

This study looked at how fermented dairy (like yogurt) and non-fermented dairy (like milk) affect bowel habits and thinking skills in healthy women who have bowel movements every other day or less. 96 women took part, eating 300g of dairy daily for 4 weeks. The goal was to see if one type improves digestion and brain function more than the other, and to understand how the gut and brain are connected.

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

96 people

The number who actually took part.

Started

Apr 2024

Finished

Dec 2025

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

45 to 65 years

Sex

Female 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: * Self-reported defecations every second day or less (intervention study only) * Willing to consume 300g milk/yogurt on a daily basis (intervention study only) * Owns a smartphone (iOS 11.0 and later or Android 5.0 and up) * Understand Danish or English Exclusion Criteria: * Current pregnancy or lactation * Dairy allergy or intolerance * Prior diagnosis of psychiatric or neurological illness * Current diagnosis of depression, anxiety, or stress * Prior diagnosis of metabolic or gastrointestinal disease (e.g., cardiovascular disease, diabetes, chronic constipation or diarrhea, inflammatory bowel diseases (IBD), celiac disease, small intestinal bacterial overgrowth (SIBO), cancer, etc.) * Use of antibiotics within the last month * Use of peroral corticosteroids (inhalers excepted) * Use of medications that alter normal bowel function and metabolism (e.g., laxatives, antidiarrheal agents, narcotics, diuretics, anticonvulsants, etc.) * Use of neuroactive medications (e.g., antidepressants, anxiolytics, anticonvulsants, antipsychotics, antiparkinsonian, etc.) * Concurrent participation in another trial * Any condition that makes the project responsible researcher doubt the feasibility of the volunteer´s participation

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Conditions

The condition(s) this trial relates to.

constipation disorder

As listed by the trial registrant

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

Constipation Healthy

Contacts and locations

Locations

  • University of Copenhagen, Department of Nutrition, Exercise and Sports

    Copenhagen, Denmark

More trials for these conditions

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