Could a 16-Hour fast be the key to better blood sugar in teens?
NCT ID NCT04536480
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
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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
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87 people
The number who actually took part.
- Started
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Apr 2023
- Finished
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Jul 2026
- Lead sponsor
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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
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12 to 21 years
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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.
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
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