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

Condition(s) studied

Investigational drug(s) / intervention(s)

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

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

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

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

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

No Side: No side control (no caloric contribution).

Study 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.

Eligibility

Primary outcome measure(s)

• Glycemic Response (Acute Phase) — Change from baseline (measured at baseline (0-minute), 15-minute, 30-minute, 60-minute, 90-minute, and 120-minute post-treatment consumption).
  Blood glucose (mmol/L). Blood glucose concentrations will be measured using a Dexcom G7 CGM system.
• Rest-of-day Blood Glucose — Continuous measurements for 24 hours post-treatment consumption.
  Blood glucose (mmol/L). Rest-of-day blood glucose concentrations will be determined using a Dexcom G7 CGM system.
• Ad Libitum Food Intake — At 120 minutes post-treatment consumption
  Lunch pizza meal. Food intake will be determined by weighing the meal before and after serving. The net weight of the test meal will be converted to calories.

Trial sites (1)

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