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Can a daily bottle of kefir reshape your gut health?

NCT ID NCT07790666

Knowledge-focused Sponsor: Danone Global Research & Innovation Center Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 27, 2026 · Last updated Sep 01, 2026 · Updated 3 times

Summary

Researchers in Spain are asking whether drinking one bottle of Activia Kefir every day for two weeks changes how people feel about their digestion and overall health. The study will follow 550 adults, including both regular kefir drinkers and newcomers, and will compare their gut bacteria before and after the two-week period. Participants will answer questionnaires about digestive symptoms, stool habits, and general wellbeing, and provide stool samples at home. The goal is to see if real-world kefir consumption is linked to better gut health.

What this could mean

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

Active substance
Activia Kefir, a commercialized dairy product, consumed as 280 mL per day for two weeks
What this could lead to
If the study shows benefits, it could support the idea that daily kefir consumption improves digestive comfort and overall wellbeing in everyday life.
What could go wrong
This is an observational, real-world study without a control group, so any perceived benefits may be due to placebo or other factors. Results may not apply to everyone.

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.

Participants

About 550 people

The number the study aims to enrol. It can still change while the study runs.

Started

Aug 2026

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

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

Who is studied

The study will include male and female participants aged 18 years and older at the time of screening. Both current (Activia) kefir consumers and individuals who are new to (Activia) kefir consumption will be eligible for participation.

Ages

18 to 90 years

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.

Inclusion Criteria: 1. Males and females aged 18 years and older at the time of screening; 2. Willingness to consume Activia Kefir and complete the requested questionnaires; 3. Living in the designated locations in Spain, able to read and write in Spanish; 4. Have a personal electronic device compatible and connectable to internet (i.e., computer, laptop, smartphone) to fill the questionnaires; 5. Signed informed consent. Exclusion Criteria: 1. People that currently participate in another study with (dairy) investigational or marketed products; 2. Severely immunocompromised individuals (e.g., post-transplant, advanced HIV/AIDS, undergoing chemotherapy); 3. Individuals with known allergies or intolerances to product ingredients. For lactose maldigestion, kefir may improve tolerance, so individuals who are aware of their condition and still wish to participate can be included.

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As listed by the trial registrant

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

Kefir usual consumers and new kefir consumers

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    3 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Mmr Research Worlwide B.V

    RECRUITING

    Barcelona, Spain

  • Mmr Research Worlwide B.V

    RECRUITING

    Madrid, Spain

  • Mmr Research Worlwide B.V

    RECRUITING

    Valencia, Spain