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When you eat matters: stanford study tests meal timing for better blood sugar and sleep

NCT ID NCT05413928

Knowledge-focused Sponsor: Stanford University 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
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 Results may not be published yet.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 This study
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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This Stanford study looked at how changing when and what you eat affects blood sugar, body temperature, and sleep in people with prediabetes, type 2 diabetes, and healthy adults. Participants followed different meal-timing schedules, like eating within a 10-hour window starting early or late in the day. The goal was to understand how these simple changes might help manage blood sugar and improve sleep.

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 (early or late eating windows) and macronutrient-controlled meals
What this could lead to
If successful, this could help design simple meal-timing strategies to improve blood sugar control and sleep for people with prediabetes or type 2 diabetes.
What could go wrong
This small, early-stage study was terminated early, so results may be limited. Findings may not apply to everyone, and the behavioral changes may be hard to maintain long-term.

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

29 people

The number who actually took part.

Started

Feb 2023

Finished

Oct 2024

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 years and older

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: * Be 18 years of age or older; * Not be pregnant, if female; * Be generally healthy (with no apparent symptoms at the time of enrollment) * Patients with prediabetes or diet- controlled or type 2 diabetes or controlled with metformin, will also be allowed to participate. * Be willing to provide written informed consent for all study procedures. Exclusion Criteria: * major organ disease * pregnant/lactating * diabetes medications except for metformin * malabsorptive disorders like celiac sprue * heavy alcohol use * use of weight loss medications or specific diets * weight change \>2 Kg in the last month * history of bariatric surgery * Any medical condition that physicians believe would interfere with study participation or evaluation of results * Mental incapacity and/or cognitive impairment on the part of the patient that would preclude adequate understanding of, or cooperation with, the study protocol.

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Conditions

The condition(s) this trial relates to.

prediabetes syndrome type 2 diabetes mellitus

As listed by the trial registrant

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

Healthy Prediabetes Type 2 diabetes

Contacts and locations

Locations

  • Stanford University

    Stanford, California, 94304, United States

More trials for these conditions

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