Timing your meals could be key to blood sugar control, new study suggests
NCT ID NCT06118931
First seen Jun 27, 2026 · Last updated Jul 01, 2026 · Updated 2 times
Summary
This study looks at whether the timing of a 9-hour eating window (early, mid, or late in the day) affects blood sugar control in people with obesity who have or are at risk for type 2 diabetes. Over 7 days, 120 participants will follow one of three time-restricted eating schedules while wearing a continuous glucose monitor. The goal is to see if starting the eating window earlier or later makes a difference in average blood sugar levels.
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 (intermittent fasting with a 9-hour eating window)
- What this could lead to
- If successful, this could show that simply adjusting when you eat (not what you eat) helps control blood sugar, offering a practical lifestyle tool for managing or preventing type 2 diabetes.
- What could go wrong
- This is a short, early-stage study (7 days) with only 120 participants, so results may not apply to longer-term use or to everyone. It also does not restrict food quality or amount, which could limit blood sugar 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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About 123 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jun 2025
- Expected to finish
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Jun 2027
An estimate. End dates often move.
- 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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40 years and older
- 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.
Inclusion Criteria: * Aged 40 years or older * Body mass index \<50 kg/m2 * Have access to an Apple or Android cellphone with Bluetooth. * Have type 2 diabetes or be at risk for type 2 diabetes (defined as self-report of pre-diabetes, a recent (within 12 months) measure of HbA1c between 5.7 and 6.4%, waist circumference (WC) that is BMI specific; for women: BMI \>= 18.5-24.9, WC \>= 80cm; BMI \>= 25-29.9, WC \>= 90cm; BMI \>= 30-34.9, WC \>= 105cm; BMI \>= 35+, WC \>= 115cm; for men: BMI \>= 18.5-24.9, WC \>= 90cm; BMI \>= 25-29.9, WC \>= 100cm; BMI \>= 30-34.9, WC \>= 110cm; BMI \>= 35+, WC \>= 125cm. Exclusion Criteria: * Individuals with type 2 diabetes will be excluded if: (1) currently on \>2 monotherapies for diabetes, (2) have had diabetes therapy medication or dosage changes \<3 months, (3) self-reported hemoglobin A1c \>9.0%, (4) taking exogenous insulin, or (5) taking sulfonylureas * The following exclusion criteria applies to all potential participants: 1. History of or referral for bariatric surgery 2. Weight loss \>3% in the last 3 months 3. Taking antiobesity (weight loss) medications 4. Body weight \>390lbs 5. Diagnosed with severe cognitive disorder that precludes them from giving consent 6. Inability or unwillingness to change their eating window to follow those prescribed in the study 7. Currently consistently eating during \<11.5 hour period . 8. Physician-diagnosed eating disorder 9. Having a pacemaker or receiving dialysis. 10. Not having access to a Lifelabs location.
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Remote Ontario-wide
RECRUITINGToronto, Ontario, Canada
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