Evaluation of Pulse Fibre Supplementation on Obesity and the Metabolic Syndrome

January 16, 2020 updated by: Dr. Raylene Reimer, University of Calgary

Evaluation of Pulse Fibre Supplementation in Obesity and the Metabolic Syndrome: Generating Evidence in Support of Health Claims

The recent dramatic increase in obesity has been linked to a reduction of dietary fibre intake. We hypothesized that supplementing the diet of overweight and obesity adults with pulse fibre will improve their metabolic status, chiefly defined as greater weight loss. Other metabolic health improvements may include improved glucose control and reduced inflammatory markers.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The main objective of our study is to assess the effects of pulse fibre supplementation on weight loss in an overweight and obese adult population.

Primary objective - To determine the effects of a 12 week intake of 15g/day of pea hull fibre on weight loss supported by body composition measures.

Secondary objective - To measure glucose control and appetite regulation in overweight and obese adults consuming 15g/day of pea hull fibre compared to a placebo control with the use of plasma HbA1c and an oral glucose tolerance test (OGTT).

Tertiary objective - To examine mechanisms of action of pulse fibre supplementation by determining the impact of pulse fibre supplementation on gut microbiota, serum metabolomics and fecal short-chain fatty acid and bile acid concentrations.

Study Type

Interventional

Enrollment (Actual)

53

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Canada
    • Alberta
      • Calgary, Alberta, Canada, T2N 1N4
        • University of Calgary

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Males and females
  • Age 18 - 70 years
  • BMI 25 - 38 kg/m-2
  • Stable body weight for at least 3 months prior to the study

Exclusion Criteria:

  • Concomitant use of any weight loss medication, diet or exercise regime
  • Use of corticosteroids, anti-depressants, anti-epileptic medications, lipid lowering medication, diabetes medications
  • Previous bariatric or other intestinal surgeries
  • Pregnancy or lactation
  • Weight loss > 3 kg within preceding 3 months to enrollment
  • Use of bulk laxatives or probiotics/prebiotics supplements
  • Antibiotic use in the past month
  • Clinically significant cardiovascular or respiratory or liver disease

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Pulse Fibre
The intervention group will receive a biscuit containing 5g/serving of yellow pea fibre to be eaten 3 times per day approximately 30 minutes prior to their 3 largest meals.
Dietary supplement: Pulse fibre
Yellow pea hull fibre incorporated into a biscuit at 5 g/serving.
Placebo Comparator: Control
The placebo group will receive a biscuit an isocaloric control biscuit that is similar in taste and texture and without pulse fibre to be eaten 3 times per day approximately 30 minutes prior to their 3 largest meals.
Dietary supplement: Control
Control biscuit with no yellow pea hull fibre.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Fat Mass at 12 Weeks
Time Frame: Value at 12 weeks minus value at baseline
Value at 12 weeks minus value at baseline assessed with dual energy x-ray absorptiometry.
Value at 12 weeks minus value at baseline

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
HbA1c at 12 Weeks
Time Frame: 12 weeks
Assessed via HbA1c
12 weeks
Change in Objective Appetite at 12 Weeks
Time Frame: 12 weeks minus baseline
Value at 12 weeks minus baseline energy intake during weighed lunch buffet.
12 weeks minus baseline

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Cholesterol Profile at 12 Weeks
Time Frame: 12 weeks
Serum LDL (low density lipoprotein) cholesterol
12 weeks
Serum Cytokine at 12 Weeks
Time Frame: 12 weeks
Serum cytokine IL-6 measured at 12 weeks
12 weeks
Alpha Diversity of Gut Microbiota at 12 Weeks
Time Frame: 12 weeks
Gut microbiota alpha diversity measured at 12 weeks as Chao index. Chao index is an abundance-based estimator of species richness within a sample. There are no preset minimum and maximum values but scores typically range from 0 to 4000. A higher score is generally regarded as better.
12 weeks
Serum Metabolomics at 12 Weeks
Time Frame: 12 weeks
Serum metabolomics measured at 12 weeks using 1H-NMR analysis. Principal component analysis is used to see if two or more groups of samples separate into distinct clusters. The principal components generated in this analysis range from 0-100%. A higher value means that more variability among the samples is explained by this principal component.
12 weeks
Fecal Short-chain Fatty Acid Concentrations
Time Frame: 12 weeks
Fecal acetate concentration measured at 12 weeks
12 weeks
Fecal Bile Acid Concentration
Time Frame: 12 weeks
Fecal cholic acid concentration measured at 12 weeks
12 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Calgary

Collaborators

Alberta Innovates Health Solutions
Alberta Pulse Growers
Alberta Innovates Bio Solutions

Investigators

  • Principal Investigator: Raylene Reimer, PhD, RD, University of Calgary

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

October 1, 2012

Primary Completion (Actual)

May 1, 2013

Study Completion (Actual)

November 26, 2018

Study Registration Dates

First Submitted

October 23, 2012

First Submitted That Met QC Criteria

October 30, 2012

First Posted (Estimate)

November 1, 2012

Study Record Updates

Last Update Posted (Actual)

January 21, 2020

Last Update Submitted That Met QC Criteria

January 16, 2020

Last Verified

January 1, 2020

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 24804

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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