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Could dimming lights and early dinners boost insulin sensitivity?

NCT ID NCT05943626

Disease control Sponsor: University of Utah 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 05, 2026 · Last updated Aug 06, 2026 · Updated 1 time

Summary

This study tests whether a behavioral program that reduces evening light exposure and encourages finishing meals at least four hours before bedtime can improve how the body handles sugar. Overweight adults aged 18-45 who habitually sleep less than 6.5 hours per night will be randomly assigned to either this circadian intervention or a standard healthy lifestyle advice group. The main goal is to see if the circadian approach improves insulin sensitivity, which is a key marker of metabolic health.

What this could mean

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

Active substance
A behavioral program that reduces evening and nighttime light exposure, increases morning light, and stops eating at least 4 hours before bedtime.
What this could lead to
If effective, this simple lifestyle approach could offer a drug-free way to improve insulin sensitivity and reduce cardiometabolic risk in people who sleep poorly.
What could go wrong
This is a small early-stage trial, so results may not apply broadly. The intervention relies on participants sticking to strict light and eating schedules, which may 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 20 people

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

Started

Jun 2023

Expected to finish

Jun 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 45 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: 1. Age: 18-45 years old; equal numbers of men and women 2. Body mass index (BMI): 25.0-34.9 kg/m2, 3. Sleep Habits: habitual self-reported average total sleep time (TST) \<6.5 hours per night for prior 6 months Exclusion Criteria: 1. Clinically diagnosed sleep disorder or major psychiatric illness 2. Evidence of significant organ dysfunction or disease (e.g., diagnosed diabetes, cardiovascular disease, or kidney disease) 3. Use of prescription drugs or substances known to influence sleep or glucose metabolism 4. Shift-work: current or history of within last year 5. Weight change: \>10% of body weight over prior six months 6. Experiencing menopause or post-menopausal 7. Current enrollment in weight loss or physical activity program like the Diabetes Prevention Program 8. Currently pregnant or planning to become pregnant, or currently lactating. 9. Currently smoking 10. Alcohol intake \>3 drinks per day or \>14 drinks per week

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Conditions

The condition(s) this trial relates to.

abdominal obesity-metabolic syndrome Feeding Behavior Insulin Resistance Intermittent Fasting metabolic syndrome X Obesity obesity disorder Overweight sleep disorder Sleep Hygiene type 2 diabetes mellitus

As listed by the trial registrant

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

Cardiometabolic syndrome Eating habit Insulin sensitivity Lifestyle factors Overweight and obesity Sleep Sleep hygiene Time restricted feeding Type 2 diabetes

How to take part

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

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

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

  3. 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 ↗

  4. A doctor treating you

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Contacts and locations

Locations

  • College of Health Research Complex--University of Utah

    RECRUITING

    Salt Lake City, Utah, 84112, United States

    Contact Email: •••••@•••••

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