Interaction Between White Potato Consumption and Meal Timing on Glycemic Response and Appetite in Adults

NCT ID: NCT07230951

Last Updated: 2025-11-17

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

RECRUITING

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-10-30

Study Completion Date

2027-10-31

Brief Summary

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The purpose of this study is to evaluate the interaction between white potato consumption and meal timing on glycemic response, subjective appetite, and energy intake in adults. The investigators hypothesize that white potatoes will modulate glycemic response, enhance satiety, and mitigate subsequent meal consumption and overall food intake when compared with meals containing low glycemic carbohydrates. Furthermore, they anticipate that the timing of white potato consumption will yield differential effects, with breakfast consumption exerting a more pronounced impact on satiety and subsequent food intake reduction compared to dinner consumption.

Detailed Description

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A randomized within-subject repeated measures experiment will be used to study the interaction between white potato consumption and meal timing on glycemic response, subjective appetite, and energy intake in adults. In Experiment 1, participants will consume, in a random order on separate mornings, one of six test meals consisting of an egg omelette and a test side of: (1) Oven-baked home fries, (2) Oven-baked white russet potatoes, (3) Deep-fried, quick serve fries, (4) Oven-baked fries, (5) Oven-baked cauliflower tots, or (6) no side. Acute glycemic response and subjective appetite will be measured at baseline and over 120-mins post treatment consumption. At 120-min, food intake will be evaluated via an ad libitum lunch. Rest of day food intake and glycemic response will be collected until the participant goes to bed. Blood glucose measurements will be collected using the Dexcom G7 continuous glucose monitoring system.

Conditions

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Adult Appetite Glycemic Response Mealtiming Healthy

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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Oven-baked Home Fries

Test Treatment

Group Type EXPERIMENTAL

Oven-baked Home Fries

Intervention Type OTHER

Oven-baked Home Fries (241 g; McCain Ltd.). Test treatments matched for calories (284 kcal)

Oven-baked White Russet Potato

Test Treatment

Group Type EXPERIMENTAL

Oven-baked White Russet Potato

Intervention Type OTHER

Oven-baked White Russet Potato (299 g). Test treatments matched for calories (284 kcal)

Oven-baked Fries

Test Treatment

Group Type EXPERIMENTAL

Oven-baked Fries

Intervention Type OTHER

Oven-baked Fries (201 g; McCain Ltd.). Test treatments matched for calories (284 kcal)

Deep Fried, Quick Serve Fries

Test Treatment

Group Type EXPERIMENTAL

Deep Fried, Quick Serve Fries

Intervention Type OTHER

Deep Fried, Quick Serve Fries (108 g; McCain Ltd.). Test treatments matched for calories (284 kcal)

Oven-baked Cauliflower Veggie Tots

Test Treatment

Group Type EXPERIMENTAL

Oven-baked Cauliflower Veggie Tots

Intervention Type OTHER

Oven-baked Cauliflower Veggie Tots (186 g; Green Giant). Test treatments matched for calories (284 kcal)

No Side

Test Treatment

Group Type EXPERIMENTAL

No Side

Intervention Type OTHER

No side control (no caloric contribution).

Interventions

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Oven-baked Home Fries

Oven-baked Home Fries (241 g; McCain Ltd.). Test treatments matched for calories (284 kcal)

Intervention Type OTHER

Oven-baked White Russet Potato

Oven-baked White Russet Potato (299 g). Test treatments matched for calories (284 kcal)

Intervention Type OTHER

Oven-baked Fries

Oven-baked Fries (201 g; McCain Ltd.). Test treatments matched for calories (284 kcal)

Intervention Type OTHER

Deep Fried, Quick Serve Fries

Deep Fried, Quick Serve Fries (108 g; McCain Ltd.). Test treatments matched for calories (284 kcal)

Intervention Type OTHER

Oven-baked Cauliflower Veggie Tots

Oven-baked Cauliflower Veggie Tots (186 g; Green Giant). Test treatments matched for calories (284 kcal)

Intervention Type OTHER

No Side

No side control (no caloric contribution).

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* 18 - 65 years
* within the healthy body weight range \[body mass index (BMI) between 18.5 - 24.9 kg/m2\].

Exclusion Criteria

* have a previous diagnosis of diabetes and gastrointestinal, liver or kidney disease;
* have had a major medical or surgical event within the past 6 months;
* have had any significant weight fluctuation in the past 6-months;
* are taking medication that may influence dependent measures;
* are or have been on a diet within the past 6 months;
* skip breakfast or are unable to consume test treatment food.
Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Alliance for Potato Research and Education

OTHER

Sponsor Role collaborator

Toronto Metropolitan University

OTHER

Sponsor Role lead

Responsible Party

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Nick Bellissimo, PhD

Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Centre for Urban Innovation (CUI-109), School of Nutrition, Toronto Metropolitan University

Toronto, Ontario, Canada

Site Status RECRUITING

Countries

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Canada

Facility Contacts

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Nick Bellissimo

Role: primary

4169795000 ext. 553103

Other Identifiers

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REB: 25-172 [A]

Identifier Type: -

Identifier Source: org_study_id

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