Konjac-Glucomannan Fibre Blend and American Ginseng in Type 2 Diabetes

June 15, 2016 updated by: Vladimir Vuksan

Effect of Co-administration of a Konjac-Glucomannan Fibre Blend and American Ginseng (Panax Quinquefolius L.) on Glycemia and Serum Lipids in Well-controlled Type 2 Diabetes: A Randomized Controlled, Clinical Trial

The purpose of this study was to determine whether the co-administration of a konjac-glucomannan fibre blend and American ginseng in a randomized, placebo-controlled, cross-over trial can improve diabetes management.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The study used a partially blinded, randomized, placebo controlled, crossover design. Due to the nature of the fibres it was not possible to blind the participant with respect to type of fibre. The study was divided into two phases with each phase having a four 4-week run-in period, and a 12-week treatment period, separated by a minimum 4-week wash-out period.

The treatments consisted of an ad libitum Canadian Diabetes Association recommended diet supplemented with capsules which contained either cornstarch (control) or AG (test) and a fiber supplement consisting of either wheat bran (control) or a viscous fiber blend of konjac mannan and xanthan (test). Participants were asked to attend the clinic at weeks -4, 0, 3, 6, and 12 during each phase.

Outcome measures There were three levels of outcome measures including efficacy, safety, and compliance. Statistical analysis The results are presented as mean ± SEM and considered statistically significant at p<0.05. Statistical analysis was performed using the SAS version 8.2 (SAS Institute, Cary, NC). Parametric analyses were conducted following a comparison of the sampling distribution to a normal distribution (Shapiro-Wilk and Kolmogorov-Smirnov tests). GLM was used to perform two-way ANOVA to detect differences of outcome variables in treatments and visits, controlling for treatment sequence and sex. If the effect of treatment was significant then percent differences were calculated between weeks 12 of test and control and analyzed using the GLM repeated measures one-way ANOVA controlling for sex. Parametric analyses were conducted following a comparison of the sampling distribution to a normal distribution (Shapiro-Wilk and Kolmogorov-Smirnov tests). The tests did not reject the null hypothesis at α=0.05. All comparisons were paired, thus each participant served as his/her own control. As this was a cross-over study, only participants who completed the study were included in the analysis.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
39

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

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
    • Ontario
      • Toronto, Ontario, Canada, M5C 2T2
        • Clinical Risk Factor and Modification Centre

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

40 years to 75 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Diagnosis of type 2 diabetes of at least 1 year
  • age between 40 and 75 years old
  • treated with diet and anti hyperglycemic medications
  • HbA1c between 6.5% and 8.4%
  • Systolic blood pressure <140mmHg
  • Diastolic blood pressure <90mmHg
  • Clinically euthyroid
  • Normal renal and liver function

Exclusion Criteria:

  • treated with insulin
  • age less than 40 or older than 75 years old at the start of the trial

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: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Placebo Comparator: Control
3g/d Cornstarch and 14g/d wheat bran control
Dietary supplement: Control
Fiber matched control for intervention (corn starch and wheat bran)
Experimental: K-GB&AG
3g/d American Ginseng and 7g/d Konjac-glucomannan fiber blend
Dietary supplement: American Ginseng
herb
Other Names:
  • Panax quinquefolius L.
Dietary supplement: Konjac-glucomannan fiber blend
Blend of 2 viscous fibers: konjac mannan and xanthan

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
HbA1c
Time Frame: Week 12
Difference at week 12 between control and test intervention
Week 12

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Total Cholesterol
Time Frame: Week 12
Difference at week 12 between control and test intervention
Week 12
High sensitivity C reactive protein
Time Frame: Week 12
Difference at week 12 between control and test intervention
Week 12
Apolipoprotein A and B
Time Frame: Week 12
Difference at week 12 between control and test intervention
Week 12
Oxidized LDL
Time Frame: Week 12
Difference at week 12 between control and test intervention
Week 12
Blood pressure
Time Frame: Week 12
Difference at week 12 between control and test intervention
Week 12
LDL Cholesterol
Time Frame: week 12
Difference at week 12 between control and test intervention
week 12
Triglycerides
Time Frame: week 12
Difference at week 12 between control and test intervention
week 12
HDL-cholesterol
Time Frame: week 12
Difference at week 12 between control and test intervention
week 12
fasting glucose
Time Frame: week 12
Difference at week 12 between control and test intervention
week 12
fasting insulin
Time Frame: week 12
Difference at week 12 between control and test intervention
week 12

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
AST
Time Frame: Week 12
Difference at week 12 between control and test intervention
Week 12
creatinine
Time Frame: Week 12
Difference at week 12 between control and test intervention
Week 12
Clotting factors
Time Frame: Week 12
Difference at week 12 between control and test intervention
Week 12
Subjective symptoms
Time Frame: week 12
VAS scale, Difference at week 12 between control and test intervention
week 12
Dietary change
Time Frame: week 12
3 day dietary record, difference at week 12 between control and test intervention
week 12
ALT
Time Frame: week 12
Difference at week 12 between control and test intervention
week 12

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Vladimir Vuksan

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Canadian Diabetes Association

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

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
March 1, 2002

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 1, 2004

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 1, 2005

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 2, 2016

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 15, 2016

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 20, 2016

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 20, 2016

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 15, 2016

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2016

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • RB02-014C

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.

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings