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Night Owls' metabolism under the microscope: new study targets glucose control

NCT ID NCT06507722

Knowledge-focused Sponsor: Johns Hopkins 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at how a person's natural sleep pattern (chronotype) affects their body's ability to handle sugar. Researchers will compare blood sugar and insulin responses in 70 overweight young adults (ages 18-23) who are either night owls or early birds. Participants will take glucose tests and eat meals at times that match or clash with their internal body clock. The goal is to understand why night owls may have higher risk for prediabetes, not to test a new treatment.

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 70 people

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

Started

Feb 2025

Expected to finish

Jan 2030

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 23 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: * Overweight similar to (BMI ≥ 85th percentile but \<95th percentile for age and sex per Centers for Disease Control and Prevention growth curves (as Centers for Disease Control and Prevention growth curves contain ages ≤ 20y; if ages 21-23 years, the BMI ≥ 85th and \<95th percentile equivalents for a 20-year-old will be used)) * Post-pubertal * Normal sleep duration (avg. \>7 hours of sleep per night) * Social jetlag (difference between weekend and weekday sleep) of \< 2 hours. Exclusion Criteria: * Known diabetes, sleep disorders, major organ system illness, pregnancy, or genetic syndrome * Medication use known to affect insulin sensitivity, glucose tolerance, or circadian rhythm * Screening high risk for obstructive sleep apnea * Night shift work.

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Conditions

The condition(s) this trial relates to.

glucose intolerance Overweight prediabetes syndrome

As listed by the trial registrant

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

Impaired glucose tolerance Overweight 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

  • Johns Hopkins School of Medicine

    RECRUITING

    Baltimore, Maryland, 21287, United States

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