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Can a 9-Hour eating window reset blood sugar and body rhythms?

NCT ID NCT07820384

Disease control Sponsor: Cambridge University Hospitals NHS Foundation Trust 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 15, 2026 · Last updated Sep 16, 2026 · Updated 1 time

Summary

Researchers are testing whether limiting all meals and snacks to a 9-hour window each day improves blood sugar control, insulin levels, and daily metabolic rhythms in adults with obesity and prediabetes. The trial enrolls 26 people aged 35 to 75 who usually eat over 13 hours a day. Participants follow either the 9-hour eating schedule or a 14-hour window for 12 weeks, and researchers measure blood sugar, insulin, and appetite hormones over a full 24-hour test day.

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, a schedule that limits all meals and snacks to a 9-hour window each day
What this could lead to
If it works, this could support time-restricted eating as a practical way to improve blood sugar control and lower heart disease risk in people with obesity and prediabetes.
What could go wrong
This is a small, 12-week study, so any benefits may not last or apply to everyone. Participants must stick to a strict eating window, which can be hard to maintain.

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 26 people

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

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

May 2031

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

35 to 75 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: * willing and able to give informed consent for participation in the study * aged 35-75 years * men and women * body mass index 27-45 kg/m2 * fasting plasma glucose 5.6-6.9 mmol/L, or 2h OGTT plasma glucose 7.8-11.1 mmol/L or haemoglobin A1C 39-46 mmol/mol, homeostasis model assessment-insulin resistance (HOMA-IR) score ≥2.73 * self-reported habitual eating period ≥ 13 h per day Exclusion Criteria: * shift worker * fasting \>12 h/day more than once a week * vegan * \> once a week no food intake after \~1800 h * habitually waking up before \~0400 h and sleeping before \~2100 h * unstable weight (\>5% change the last 2 months) * type 1 or 2 diabetes * sleep disorder (individuals with well-controlled sleep apnoea) * eating disorder * cancer in last 5 years * conditions that render subject unable to complete all testing procedures (including individuals with known allergies or contraindications to the medications used in this study) * use of medications that affect the study outcome measures or increase the risk of study procedures and that cannot be temporarily discontinued (e.g., steroids, alpha- or beta-adrenergic blockers or agonists, etc.) * smoking and illegal drug use * pregnant or lactating * gastrointestinal or bariatric surgery (except cholecystectomy and appendectomy) * unable to grant voluntary informed consent or comply with the study instructions * individuals with electromedical devices * prisoners * alcohol abuse

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder prediabetes syndrome

As listed by the trial registrant

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

Obesity Prediabetes

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

    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

  • Cambridge Clinical Research Centre

    Cambridge, CB2 0QQ, United Kingdom

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