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CompletedNCT07444671Updated Mar 4, 2026

Impact of Time-restricted Eating on Sleep, Glucose and Insulin Sensitivity

An interventional study of Time restricted eating and Control eating in Time Restricted Eating, sponsored by Colorado State University. Completed at 1 site in United States. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-03-04.

Sponsored by Colorado State University · Not applicable, Interventional, and Basic science

From the registry’s dates

  • Registered 7 years 2 months after the study started (first participant enrolled Dec 2018, registered Feb 2026).
Phase
Not applicable
Study type
Interventional
Enrollment
13
Allocation
Non-randomized
Ages
18 Years to 65 Years
Sex
All
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Study summary

The purpose of this research study is to see how the timing of eating impacts participants sleep and how the body responds to sugar.

Read the detailed description

This research study is aimed to answer how the timing of eating impacts participants sleep and how the body responds to sugar. Participants must be healthy and between the ages of 18-65 to join . This research study will take 2 weeks of outpatient monitoring, and 2 different nights staying in the Sleep and Metabolism Lab. There are some risks to participating in this study, like hunger, skin irritation, discomfort with blood draws, and uncomfortableness while being observed. The investigators hope that this research will benefit the knowledge learned about circadian rhythms and metabolic disease and how the timing of eating affects these things.

02

Conditions studied

  • Time Restricted Eating

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03

In context

Intermittent Fasting

148 studies on the registry are indexed under Intermittent Fasting; 68 are open to participants now.

This study's enrollment of 13 is below the median of 60 across 144 interventional studies indexed under Intermittent Fasting.

Browse Intermittent Fasting studies →

Lead sponsor

Colorado State University is the lead sponsor of 112 studies on the registry; 19 are open to participants now.

Of its 5 completed or terminated interventional studies of FDA-regulated products, 3 (60%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Healthy adult men and women ages 18-65
  • habitual sleep duration between 7-9.25 hours
  • lived at altitude for at least 3 months.

Exclusion criteria

Exclusion Criteria:

  • Diagnosed acute or chronic physical or psychiatric disorders;
  • diagnosed sleep disorders;
  • not participating in another research study concurrently which could increase risks, such as those involving medication or blood sampling;
  • shiftwork in the 6 months before the study; travel more then one time zone three weeks prior to the study;
  • blood donation 30 days prior to the first study visit;
  • illicit drug use, prescribed medication use (excluding over the counter products) 30 days prior to the study visit;
  • everyday nicotine use;
  • regular consumption of over 400mg caffeine per day in the past month; and consumption of over 14 alcoholic beverages a week, or more than 4 alcoholic beverages in a single day over the past month for men and consumption of over 7 alcoholic beverages a week, or more than 3 alcoholic beverages in a single day over the past month for women.
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Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
13 participants (actual)

Study arms

  • Active comparator
    Control

    For the week between equipment pickup and the first overnight stay participants will maintain normal eating habits and eat across the day based on timing discussed with study staff. During this time study staff will ask participants to record meals by taking pictures and texting them to the Lab.

    Other: Control eating

  • Experimental
    Time restricted eating

    For the week between the first and second overnight stay participants will be scheduled to eat a normal food quantity, but in a shorter period of time based on timing discussed with study staff. Typically, this will mean they will stop eating sometime in the afternoon and not eat again until breakfast the following day. During this time study staff will ask participants to record your meals by taking pictures and texting them to the Lab.

    Other: Time restricted eating

Interventions

  • OtherTime restricted eating

    For the week between the first and second overnight stay participants will be scheduled to eat a normal food quantity, but in a shorter period of time based on timing discussed with study staff. Typically, this will mean they will stop eating sometime in the afternoon and not eat again until breakfast the following day.

  • OtherControl eating

    Participants consume a normal eating schedule across the day.

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What researchers measure

Primary outcomes

  1. 24 hour Continuous Glucose Monitoring (Average glucose)

    Participants will wear a continuous glucose monitor for 2 weeks. Week 1 will be compared to week 2.

    Time frame: 2 weeks

  2. Oral glucose tolerance test (2 hour glucose)

    Participants will complete an oral glucose tolerance test on 2 occasions (end of week 1 and end of week 2)

    Time frame: 2 weeks

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Study locations

1 site
  • Sleep and Metabolism Laboratory
    Fort Collins, Colorado 80523, United States
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References and documents

Individual participant data

Plan to share: No — IPD will be shared upon reasonable request to the PI, Dr. Josiane Broussard

No publications or documents are linked to this record.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 4, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT07444671
Lead sponsor
Colorado State University
Responsible party
Sponsor
First posted
Mar 3, 2026
Start date
Dec 7, 2018
Primary completion
May 25, 2021
Completion
May 25, 2021
Last update
Mar 4, 2026

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2026. You cannot join it, but the record below documents what was studied.

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