Remote Time-restricted EAting DeliverY

NCT ID: NCT05454943

Last Updated: 2025-10-01

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

178 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-07-07

Study Completion Date

2024-01-30

Brief Summary

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This study will evaluate the implementation and effectiveness of free-living TRE on biological and behavioural breast cancer risk factors.

Detailed Description

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TRE is an eating pattern where individuals consume ad libitum energy intake within a set window of time, commonly 8 hours, which induces a fasting window of 16 hours per day (i.e., 16:8 TRE). TRE is a simple and accessible lifestyle intervention with high adherence potential that may target both biological and behavioural mechanisms of breast cancer risk.

Conditions

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Metabolic Disturbance

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Standardized TRE protocol + External Support

Participants will be asked to follow a standardized 16:8 TRE protocol with an 11 am to 7 pm eating window for 16 weeks. Participants receive support to follow the TRE intervention from the study team which will include an initial consultation with a registered dietitian and ongoing tailored feedback via brief support calls from study staff at weeks 1, 3, 6, and 12.

Group Type EXPERIMENTAL

Standardized TRE Protocol

Intervention Type BEHAVIORAL

A standardized 16:8 TRE protocol with an 11 am to 7 pm eating window.

External Support for TRE

Intervention Type BEHAVIORAL

External support (from study staff) that includes consultation with a registered dietitian and ongoing tailored feedback via support calls at weeks 1, 3, 6, and 12.

Standardized TRE protocol + Peer Support

Participants will be asked to follow a standardized 16:8 TRE protocol with an 11 am to 7 pm eating window for 16 weeks. Each participant will be matched with another participant in the same group to provide peer-based support to adhere to TRE. Study staff will introduce pairs and provide an introduction to TRE and then pairs will meet by phone/video at weeks 1, 3, 6, and 12 at a minimum, with additional contact encouraged.

Group Type EXPERIMENTAL

Standardized TRE Protocol

Intervention Type BEHAVIORAL

A standardized 16:8 TRE protocol with an 11 am to 7 pm eating window.

Peer Support for TRE

Intervention Type BEHAVIORAL

Matched pairs will meet by phone/video at weeks 1, 3, 6, and 12.

Personalized TRE protocol + External Support

Participants will be asked to follow TRE for 16 weeks with a protocol that is personalized to their preferences within the following pre-specified rules: 1) 8-10 hour eating window; 2) self-selected eating window start time as long as it ends ≥3h before bedtime; 3) if days off are required, aim to do so after following TRE for ≥5 successive days each week. Participants receive support to follow the TRE intervention from the study team which will include an initial consultation with a registered dietitian and ongoing tailored feedback via brief support calls from study staff at weeks 1, 3, 6, and 12.

Group Type EXPERIMENTAL

Personalized TRE Protocol

Intervention Type BEHAVIORAL

A personalized TRE protocol following pre-specified rules: 1) 8-10 hour eating window; 2) self-selected eating window start time as long as it ends ≥3h before bedtime; 3) if days off are required, aim to do so after following TRE for ≥5 successive days each week.

External Support for TRE

Intervention Type BEHAVIORAL

External support (from study staff) that includes consultation with a registered dietitian and ongoing tailored feedback via support calls at weeks 1, 3, 6, and 12.

Personalized TRE protocol + Peer Support

Participants will be asked to follow TRE for 16 weeks with a protocol that is personalized to their preferences within the following pre-specified rules: 1) 8-10 hour eating window; 2) self-selected eating window start time as long as it ends ≥3h before bedtime; 3) if days off are required, aim to do so after following TRE for ≥5 successive days each week. Each participant will be matched with another participant in the same group to provide peer-based support to adhere to TRE. Study staff will introduce pairs and provide an introduction to TRE and then pairs will meet by phone/video at weeks 1, 3, 6, and 12 at a minimum, with additional contact encouraged.

Group Type EXPERIMENTAL

Personalized TRE Protocol

Intervention Type BEHAVIORAL

A personalized TRE protocol following pre-specified rules: 1) 8-10 hour eating window; 2) self-selected eating window start time as long as it ends ≥3h before bedtime; 3) if days off are required, aim to do so after following TRE for ≥5 successive days each week.

Peer Support for TRE

Intervention Type BEHAVIORAL

Matched pairs will meet by phone/video at weeks 1, 3, 6, and 12.

Control Group

Participants will be asked to maintain their usual diet and physical activity patterns for 16 weeks. They will receive the same number and timing of calls from study staff as the other groups (at randomization, 1, 3, 6, 12 weeks).

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Standardized TRE Protocol

A standardized 16:8 TRE protocol with an 11 am to 7 pm eating window.

Intervention Type BEHAVIORAL

Personalized TRE Protocol

A personalized TRE protocol following pre-specified rules: 1) 8-10 hour eating window; 2) self-selected eating window start time as long as it ends ≥3h before bedtime; 3) if days off are required, aim to do so after following TRE for ≥5 successive days each week.

Intervention Type BEHAVIORAL

External Support for TRE

External support (from study staff) that includes consultation with a registered dietitian and ongoing tailored feedback via support calls at weeks 1, 3, 6, and 12.

Intervention Type BEHAVIORAL

Peer Support for TRE

Matched pairs will meet by phone/video at weeks 1, 3, 6, and 12.

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Females
* No cancer history
* ≥50 years old
* Have metabolic dysfunction (defined as self-reported diagnosis of pre-diabetes, type 2 diabetes, or at least moderate Canadian diabetes risk (CANRISK) score)
* Access to an Ontario Lifelabs location
* Owns a smartphone with Bluetooth capability with Apple or Android operating system

Exclusion Criteria

* Type 1 diabetes
* Taking exogenous insulin, sulfonylureas, or GLP-1 receptor agonists
* Self-reported history of an eating disorder
* BMI \<18.5 kg/m
* Working night or rotating shifts
* Eating window \<12 hours or consistently eating less than 3 meals/day in the past 3 months
* Major dietary changes within the past 3 months (i.e. calorie counting, ketogenic diet)
Minimum Eligible Age

50 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

Yes

Sponsors

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University of Toronto

OTHER

Sponsor Role lead

Responsible Party

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Amy Kirkham

Amy Kirkham, Assistant Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Amy A Kirkham, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Toronto

Locations

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Remote Ontario-wide

Toronto, Ontario, Canada

Site Status

Countries

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Canada

Other Identifiers

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RIS42756

Identifier Type: -

Identifier Source: org_study_id

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