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Can a 16-Hour fast help after Weight-Loss surgery?

NCT ID NCT07672821

Disease control Sponsor: Medipol University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 29, 2026 · Last updated Jun 30, 2026 · Updated 1 time

Summary

This study tests whether a 16:8 time-restricted eating diet (eating only during an 8-hour window each day) helps people with obesity manage their weight, both those who have had bariatric surgery and those who haven't. Researchers will measure changes in body weight, fat mass, and eating habits over 6 weeks. The goal is to see if this simple eating pattern can improve weight control, especially for those who experience weight regain after surgery.

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 (16:8 fasting)
What this could lead to
If successful, this approach could offer a simple, drug-free way to manage weight regain after bariatric surgery.
What could go wrong
This is a small, short-term study (40 people, 6 weeks). Results may not apply to everyone, and long-term effects are unknown.

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

Jul 2025

Expected to finish

Jul 2026

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

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Adults aged 18-65 years with obesity who have not undergone bariatric surgery * Adults aged 18-65 years with obesity who have undergone bariatric surgery and experienced insufficient weight loss (IWL) within 18 months post-surgery, -defined as %EWL \<50% at 18 months * Adults aged 18-65 years with obesity who have undergone bariatric surgery and experienced weight regain (WR), defined as \>25% increase in %EWL from the lowest recorded weight Exclusion Criteria: * Pregnant or breastfeeding individuals * Acute illness, active infection, or comorbid conditions limiting treatment efficacy and safety, including: cancer, type 1 diabetes, renal or hepatic failure, recent stroke or myocardial infarction, nephrolithiasis, drug or alcohol abuse, eating disorders, severe depression or other psychiatric disorders, inflammatory bowel disease (IBD), neoplasia, arrhythmic heart disease, heart failure, respiratory failure, or corticosteroid therapy * Professional athletes

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Conditions

The condition(s) this trial relates to.

Intermittent Fasting Obesity obesity disorder Overweight

As listed by the trial registrant

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

Bariatric surgery Obesity & overweight Time restricted feeding Weight regain Weight regain post bariatric surgery

How to take part

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

  1. The places running it

    2 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

  • Nev Sağlık Grubu

    RECRUITING

    Bursa, Lütfen Seçiniz., 16940, Turkey (Türkiye)

  • Nev Sağlık Grubu

    RECRUITING

    Bursa, 16940, Turkey (Türkiye)

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