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Can meal timing reset ADHD symptoms and sleep?

NCT ID NCT07821060

Symptom relief Sponsor: Spanish National Research Council 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 15, 2026 · Last updated Sep 16, 2026 · Updated 1 time

Summary

Researchers are testing whether limiting eating to a 10-hour window each day can improve quality of life, ADHD symptoms, sleep, and gut health in adults with ADHD who have disrupted body clocks. The trial enrolls 60 adults aged 18 to 65 who usually eat over more than 14 hours a day and have sleep problems. Half follow the 10-hour schedule for 12 weeks while the other half keep their usual habits, and researchers compare questionnaires, sleep diaries, and blood and saliva markers before and after.

What this could mean

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

Active substance
time-restricted eating with a 10-hour daily eating window
What this could lead to
If it works, a simple schedule change could become a low-cost way to ease ADHD symptoms and sleep problems alongside standard care.
What could go wrong
This is a small 12-week pilot with 60 people, so any benefits may be modest or fade, and sticking to a strict eating window can be hard for people with irregular routines.

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 60 people

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

Started

Mar 2024

Expected to finish

Dec 2027

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

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

Ages

18 to 65 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: Participants aged between 18 and 65, with a usual eating period of 14 hours, no or moderate alcohol consumption, no constipation, no chronic or genetic diseases other than ADHD. No consumption of antibiotics, prebiotics, or probiotics during the last three months Exclusion criteria: Participants who regularly consume antidiabetics, steroids, beta-blockers, adrenergic stimulants, laxatives, medications, or supplements known to affect sleep, circadian rhythms, or metabolism.

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Conditions

The condition(s) this trial relates to.

attention deficit hyperactivity disorder, inattentive type attention deficit-hyperactivity disorder Psychological Well-Being

As listed by the trial registrant

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

ADHD ADHD - attention deficit disorder with hyperactivity

How to take part

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

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    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

  • Iata-Csic

    Paterna, Valencia, 46980, Spain

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