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Could a 16-Hour fast be the key to better blood sugar in teens?

NCT ID NCT04536480

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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 07, 2026 · Last updated Aug 07, 2026

Summary

This trial tests whether time-limited eating—consuming all food and drinks within an 8-hour period and fasting for the remaining 16 hours—can improve blood sugar control, insulin function, and body fat in adolescents with type 2 diabetes. Participants aged 12 to 21 will follow this eating pattern without calorie restriction, and researchers will measure changes in glucose levels, hemoglobin A1c, and body composition over 12 weeks. The goal is to see if this simple dietary approach can help manage the disease and potentially reduce the need for medication.

What this could mean

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

Active substance
Time-limited eating (eating all meals within an 8-hour window, fasting for 16 hours)
What this could lead to
If effective, this eating pattern could offer a simple, drug-free way to help teens with type 2 diabetes better manage blood sugar and body weight.
What could go wrong
This is an early-stage trial with a modest number of participants, and results may not apply to all teens. Adherence to the eating schedule could be challenging, and the approach may not produce lasting benefits.

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

87 people

The number who actually took part.

Started

Apr 2023

Finished

Jul 2026

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

12 to 21 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.

All adolescents with T2D and referred to the endocrinology clinic at CHLA will be screened. Inclusion criteria are: (1) age 12-21 years; (2) Tanner stage III and above; (3) diagnosis of T2D based on the ADA diagnostic guidelines; (4) hemoglobin A1c \< 9%; and (5) participant must be willing and able to adhere to the assessments, visit schedules, and eating/fasting periods. To limit confounding factors, individuals will be considered ineligible to participate if they meet any of the following exclusion criteria: (1) previous diagnosis of Prader-Willi Syndrome, brain tumor or hypothalamic obesity; (2) serious developmental or intellectual disability; (3) previous diagnosis or subthreshold symptoms of an eating disorder (anorexia nervosa, bulimia nervosa, binge-eating disorder); (4) parent/guardian-reported physical, mental of other inability to participate in the assessments (e.g., inability to wear CGM, inability to undergo imaging testing without sedation); (5) previous or planned bariatric surgery; (6) current planned use of an anti-obesity or other diabetes medication (e.g., phentermine, topiramate, orlistat, glucagon-like-peptide-1 agonist, naltrexone, or bupropion); or (7) current participation in other interventional weight loss studies.

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Conditions

The condition(s) this trial relates to.

Intermittent Fasting obesity disorder Pediatric Obesity type 2 diabetes mellitus

As listed by the trial registrant

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

Contacts and locations

Locations

  • Children's Hospital of Los Angeles

    Los Angeles, California, 90027, United States

More trials for these conditions

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