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Extra fibre, better mood? small study tests the link

NCT ID NCT06899607

Symptom relief Sponsor: University of Reading 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at whether adding 10 grams of fibre to your daily diet for two weeks can improve mental wellbeing, including anxiety, stress, sleep, and mood. Researchers will track changes in 40 healthy adults aged 18-40 using questionnaires. It's a small, early-stage trial to see if this simple diet change is worth studying further.

What this could mean

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

Active substance
dietary fibre (10 grams per day)
What this could lead to
If it works, this could point toward a simple dietary change to help ease anxiety, stress, and sleep problems.
What could go wrong
This is a very small, early feasibility trial with only 40 people and no placebo group, so results may not be reliable or 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.

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

About 40 people

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

Started

May 2025

Expected to finish

Sep 2027

An estimate. End dates often move.

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 40 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: * Aging between 18-40 years old * Having normal vision and hearing * Having a body mass index between 18.5 and 30 * Not following a high fibre diet \>20g fibre/day as assessed by using the FiberScreen Exclusion Criteria: * Smoking * Having food allergies * Following restrictive and/or unbalanced diets * Changing dietary intake majorly in past month * Being diagnosed with any psychiatric or neurologic conditions * Being diagnosed with any cardiometabolic diseases, or hypertension or thrombosis related disorders or suffer from thyroid disease * Currently taking anticoagulants, antiplatelet medication, antidepressants, proton-pump inhibitors * Currently consuming prebiotic or probiotic supplements or laxatives * Continuous antibiotic use for \> 3 days within 1 month prior to enrolment * Continuous use of weight-loss drug for \> 1 month before screening * Having a significant gastrointestinal (GI) condition

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Conditions

The condition(s) this trial relates to.

anxiety anxiety disorder Depression sleep disorder

As listed by the trial registrant

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

Affect (mental function) Anxiety Sleep Stress

Contacts and locations

Locations

  • University of Reading, School of Psychology and Clinical Languages

    Reading, Berkshire, RG6 6ES, United Kingdom

More trials for these conditions

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