Effect of Oatmeal Varieties on Glycemic and Insulinemic Responses in Healthy Individuals

Study Overview
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Brief Summary
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The objectives of this study are to compare the glycemic and insulinemic responses over 3 hours elicited by 3 oatmeal varieties compared to each other and to controls of ready to eat and hot cereals.

Detailed Description
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Participant eligibility will be screened at visit 1. The study will be a randomized, cross-over design. Participants will come to the study site on 5 separate occasions separated by a 2-day to 2-week washout period. Participants will arrive to the lab in a fasted state. 2 fasting blood samples will be collected, and further blood sampled will be taken over a 3-hour period post study product consumption.

Official Title
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A Randomized, Controlled, Double-Blind Crossover Trial to Assess Effect of Oatmeal Varieties on Glycemic and Insulinemic Responses in Healthy Individuals

Conditions
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Glycemic Response

Intervention / Treatment
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* Other: Oatmeal


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male or non-pregnant females, 18-75 years of age, inclusive Body mass index (BMI) ≥ 20.0 and < 35 kg/m² at screening (visit 1). Willing to maintain habitual diet, physical activity pattern, and body weight throughout the trial and to refrain from smoking for 12hr prior to each visit. Willing to maintain current dietary supplement use throughout the trial. On test days, subject agrees not to take any dietary supplements until dismissal from the GI labs. Failure to comply will result in a rescheduled test visit. Normal fasting serum glucose (<7.0mmol/L capillary corresponding to whole blood glucose <6.3mmol/L). Willing to abstain from alcohol consumption and avoid vigorous physical activity for 24 h prior to all test visits. Absence of health conditions that would prevent fulfillment of study requirements as judged by the Investigator on the basis of medical history. Understanding the study procedures and willing to provide informed consent to participate in the study and authorization to release relevant protected health information to the study investigator. Exclusion Criteria: Failure to meet any one of the inclusion criteria Known history of AIDS, hepatitis, a history or presence of clinically important endocrine (including Type 1 or Type 2 diabetes mellitus), cardiovascular (including, but not limited to, atherosclerotic disease, history of myocardial infarction, peripheral arterial disease, stroke), pulmonary, biliary or GI disorders. Use of medications known to influence carbohydrate metabolism, including, but not limited to adrenergic blockers, diuretics, thiazolidinediones, metformin and systemic corticosteroids within 4 weeks of the screening visit, or with any condition which might, in the opinion of Dr. Wolever, the president of GI Testing, either: 1) make participation dangerous to the subject or to others, or 2) affect the results. Major trauma or surgical event within 3 months of screening. Unwillingness or inability to comply with the experimental procedures and to follow GI Labs safety guidelines. Known intolerance, sensitivity or allergy to any ingredients in the study products. Extreme dietary habits, as judged by the Investigator (i.e. Atkins diet, very high protein diets, etc).

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

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


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Oatmeal 1<br>40 g cereal | Other: Oatmeal<br> <br> |
| Experimental: Oatmeal2<br>40 g cereal | Other: Oatmeal<br> <br> |
| Experimental: Oatmeal 3<br>40 g cereal | Other: Oatmeal<br> <br> |
| Placebo Comparator: Ready to eat cereal<br>32.2 g cereal | Other: Oatmeal<br> <br> |
| Placebo Comparator: Hot cereal<br>28.8 g cereal | Other: Oatmeal<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| peak rise of blood glucose |  | 3 hours post dose | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incremental area under the blood glucose and insulin response curves |  | 0-3 hours post dose | 
| Peak rise of insulin |  | 0-3 hours post dose | 
| Peak glucose and insulin concentrations |  | 0-3 hours post dose | 
| Blood glucose and insulin concentrations at each time point over a 3hr period |  | 0-3 hours post dose |