Blood Glucose Response of Novel Wild Rice Enhanced Food Products (Trial 1) (ABWE)

Assessing the Blood Glucose Response of Novel Wild Rice Enhanced Food Products (ABWE) Study

The goal of this acute double-blind cross over trial is to test the effects of a wild rice cake product compared to products currently on the market on glycaemic control. The main questions it aims to answer are:

1. What is the effect compared to products currently on the market on glycaemic control?
2. Is the wild rice product palatable?

Participants will:

• consent to attend 4 study visits being 2.5 hours each
• come to each visit fasted for at least 10-12 hours.
• complete a Motivation to Eat VAS following each blood measure

Study Overview

• Status: Completed
• Conditions: Blood Glucose
• Intervention / Treatment: Other: White bread (control, 32 grams, 14.4 grams of carbohydrate); Other: Brown rice cake; Other: Wild rice (25%) and brown rice (75%) cake; Other: White bread (control, 66 grams, 31 grams of carbohydrate)

Detailed Description

This trial will be an acute double-blind cross-over trial and will investigate 2 types of rice cake products tested against a white bread control. This is the first of the two trials and will be assessing a wild rice cake and a brown rice cake against a control of white bread.

Participants will fast and arrive at the RCFTR between 7:00 and 11:00 am on the session day. They will be provided either of the study treatment based on randomization sequence. Baseline blood glucose (0 min) will be measured twice via finger stick blood sample right before their first bite of the study product, and at 15, 30, 45, 60, 90 and 120 mins after baseline in duplicate. The timer will be started when they take their first bite. VAS will be completed following consumption of the treatments to measure palatability.

The primary objective is to test the effects of a wild rice cake compared to products currently on the market by evaluating factors that influence glycemic response to wild rice in humans, performed via the finger stick blood glucose that will be measured throughout each session as outlined above.

• Study Type: Interventional
• Enrollment (Actual): 19
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Canada
  • Manitoba
    • Winnipeg, Manitoba, Canada, R2V 3M3
      • Chronic Disease Innovation Centre, Seven Oaks Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Participant is willing and able to give informed consent for participation in the trial
• Male or female between 18-50 years old
• BMI range in between 18.9-29.9 kg/m2
• Fasting glucose <5.6 mmol/L
• Usually eat breakfast
• Participant must receive at least two doses of COVID-19 vaccine that have been recognized by Winnipeg Regional Health Authorities.
• In the Investigator's opinion is able and willing to comply with all trial requirements

Exclusion Criteria:

• Fasting glucose ≥ 5.6 mmol/L or <3.5 mmol/L
• Female participant who is pregnant, lactating or planning pregnancy during the course of the trial
• Participants who indicate that they could not finish study treatments within 10 minutes
• Use of medication or supplements that may influence carbohydrate metabolism, including, not limit to adrenergic blockers, diuretics, thiazolidinediones, metformin and systemic corticosteroids within 4 weeks of screening visit
• History of disordered eating, AIDS, hepatitis, a history of clinically important endocrine (including Type I and Type II diabetes mellitus), cardiovascular (including but not limit to atherosclerotic disease, history of myocardial infarction, peripheral arterial disease, stroke), pulmonary, biliary or GI disorders
• Intolerance or allergic reaction to rice
• Existing restrictive dietary habits (such a vegan, low carbohydrate/keto) Date and version No: December 12 , 2022, Version 2 Page 7 of 15
• History of hypertension
• History of cancer within the last two years (except for non-melanoma skin cancer)
• Recent history (within 12 month of screening) or current consumption of >14 drinks per week, (1 drink = 12oz of beer, 5oz of wine or 1.5oz distilled spirits)
• Body weight change over 3.5kg for the past 3 months
• Participants who have participated in another research trial involving an investigational product in the past 12 weeks
• Had significant physical trauma or major surgery in the past 3 month or had trauma or major surgery in the past 3 months

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: Double

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Consumption of the control white bread product (32 grams, 14.4 grams of carbohydrate)	Other: White bread (control, 32 grams, 14.4 grams of carbohydrate); 32 grams of white bread, providing 14.4 grams of carbohydrate, which was incorrectly dosed and matched only half the carbohydrate in the rice cakes.
Experimental: Consumption of brown rice cake 40 grams (31 grams of carbohydrate)	Other: Brown rice cake; A 40g rice cake made of 100% brown rice (providing 31 grams of carbohydrate)
Experimental: Consumption of wild rice brown rice blend cake 40 grams (31 grams of carbohydrate)	Other: Wild rice (25%) and brown rice (75%) cake; A 40g rice cake made of a blend of 25% wild rice and 75% brown rice (providing 31 grams of carbohydrate)
Active Comparator: Consumption of the control white bread product (66 grams, 31 grams of carbohydrate); This arm was conducted after the first three arms in a non-randomized add on session as we identified an issue with the amount of carbohydrate in out comparator being half of what it was supposed to be. This arm provided 66 grams of white bread control product and there will be a minimum of three days separating each visit.	Other: White bread (control, 66 grams, 31 grams of carbohydrate); 66 grams of white bread, providing 31 grams of carbohydrate, this arm was added after the mistake in the first control dosing was discovered, so this arm was not randomized and was completed after the first three.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
The effects of different wild rice products compared to products currently on the market on glycaemic control.	Finger stick blood glucose will be measured throughout each session.	Capillary blood glucose will be measured at 0 (baseline) and then 15, 30, 45, 60, 90 and 120 minutes after the first bite of treatment.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
To measure the palatability of the wild rice products following consumption.	Visual Analogue Scale (VAS).	VAS measuring palatability will be completed immediately after the consumption of the treatments.

Collaborators and Investigators

• Sponsor: Dylan MacKay
• Collaborators: Mitacs; Protein Industries Canada
• Investigators: Principal Investigator: Dylan MacKay, PhD, University of Manitoba

Study record dates

Study Major Dates

• Study Start (Actual): July 5, 2024
• Primary Completion (Actual): April 18, 2025
• Study Completion (Actual): April 18, 2025

Study Registration Dates

• First Submitted: July 4, 2024
• First Submitted That Met QC Criteria: July 4, 2024
• First Posted (Actual): July 12, 2024

Study Record Updates

• Last Update Posted (Actual): August 24, 2025
• Last Update Submitted That Met QC Criteria: August 18, 2025
• Last Verified: August 1, 2025

More Information

Terms related to this study

• Keywords: rice; glycemic control; glycemic response
• Other Study ID Numbers: HS25756 (B2022:104)

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No