NCT07230951

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

Interaction Between White Potato Consumption and Meal Timing on Glycemic Response, Subjective Appetite, and Energy Intake in Adults.

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (estimated)
• Sponsor: Toronto Metropolitan University · Academic / Other
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Accepted

Summary

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

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

• Healthy
• Adult
• Appetite
• Glycemic Response
• Mealtiming

Interventions

Type	Name	Description
OTHER	Oven-baked Home Fries	Oven-baked Home Fries (241 g; McCain Ltd.). Test treatments matched for calories (284 kcal)
OTHER	Oven-baked White Russet Potato	Oven-baked White Russet Potato (299 g). Test treatments matched for calories (284 kcal)
OTHER	Oven-baked Fries	Oven-baked Fries (201 g; McCain Ltd.). Test treatments matched for calories (284 kcal)
OTHER	Deep Fried, Quick Serve Fries	Deep Fried, Quick Serve Fries (108 g; McCain Ltd.). Test treatments matched for calories (284 kcal)
OTHER	Oven-baked Cauliflower Veggie Tots	Oven-baked Cauliflower Veggie Tots (186 g; Green Giant). Test treatments matched for calories (284 kcal)
OTHER	No Side	No side control (no caloric contribution).

Timeline

• Start date: 2025-10-30
• Primary completion: 2027-10-01
• Completion: 2027-10-01
• First posted: 2025-11-17
• Last updated: 2025-11-17

Locations

1 site across 1 country: Canada