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6-Hour eating window: the simple diet trick that could transform your body

NCT ID NCT07574177

Disease control Sponsor: University of South Alabama 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 25, 2026 · Last updated Jul 16, 2026 · Updated 3 times

Summary

This study tests whether eating all meals within a 6-hour window each day (time-restricted eating) can improve body composition, metabolism, and heart health over 12 weeks. It also looks at whether taking weekends off makes the diet easier to stick with. Sixty adults aged 18-65 with a BMI of 26 or higher will be randomly assigned to either daily time-restricted eating or weekday-only time-restricted eating with normal weekends.

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 (TRE) and TRE with intermittent energy restriction (weekend breaks)
What this could lead to
If successful, this could show that a simple eating schedule helps people lose body fat and improve heart health without counting calories.
What could go wrong
This is a small, early-stage study with only 60 participants and no long-term follow-up. Results may not apply to everyone, and sticking to the schedule could be hard for some.

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.

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Jul 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 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: * Between 18 and 65 years of age * Body mass index (BMI) of 26 kg/m² or higher (overweight or obese range) * Physically inactive, defined as 150 minutes or less of moderate-intensity physical activity per week for the 3 months prior to enrollment * No previous history of cardiovascular disease or Type 1 or Type 2 Diabetes Mellitus * Not currently taking medications that may affect blood sugar, cholesterol, or body weight (e.g., glucose-lowering drugs, statins, or weight loss medications) * Weight stable, defined as no more than 5 kg (about 11 lbs.) of body weight change in the 3 months prior to enrollment * Willing and able to follow the study requirements, provide voluntary consent, and complete all study procedures Exclusion Criteria: * Younger than 18 or older than 65 years of age * BMI below 26 kg/m² * More than 150 minutes per week of moderate-intensity physical activity in the past 3 months * History of cardiovascular disease or Type 1 or Type 2 Diabetes Mellitus * Currently taking medications that may impact study outcomes * Weight change of more than 5 kg in the past 3 months * Pregnant, breastfeeding, or planning to become pregnant during the study * History of an eating disorder * Previous weight loss surgery (e.g., gastric bypass or sleeve gastrectomy) * Unable to fast for approximately 18 hours at a time due to a medical condition * Currently working night shifts * Has a pacemaker or any implanted electronic device (due to bioimpedance spectroscopy testing) * Any health condition the research team determines would put the participant at risk

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Conditions

The condition(s) this trial relates to.

Intermittent Fasting Obesity

As listed by the trial registrant

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

Intermittent fasting

How to take part

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  1. 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 ↗

  2. A doctor treating you

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