Effect of Green Tea Extract on Type 2 Diabetes (GTT-DM)

January 12, 2009 updated by: Taipei Hospital, Taiwan

Effect of Green Tea Extract on Type 2 Diabetes: a Randomized, Double-Blind, Placebo-Controlled Clinical Trial

The purpose of this study is to examine the effect of green tea extract (GTE) on type 2 diabetes and to explore the relationship between GTE and related hormone peptides.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Green tea is one of the most popular beverages in the world. It is believed to have beneficial effects in prevention and treatment of many diseases, one of which is anti-obesity and anti-diabetes.

The benefit effects of green tea are mainly attributed to its polyphenol content, especially the most abundant one-epigallocatechin gallate (EGCG), which might inhibit adipocyte proliferation and differentiation in vitro studies

We hypothesized that GTE would improve insulin resistance in type 2 overweight diabetes and related hormone peptides will be influenced. Thus, we conducted this randomized clinical trial to examine the effect of GTE on type 2 diabetes and to explore the relationship between GTE and related hormone peptides.

Study Type

Interventional

Enrollment (Anticipated)

32

Phase

  • Phase 2
  • Phase 3

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

  • Taiwan
      • Taipei, Taiwan, 886
        • Branch of Chinese Medicine, Taipei City Hospital
      • Taipei, Taiwan, 886
        • Branch of Chinese Medicine

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

20 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Type 2 diabetes
  • Body mass index >25 kg/mm
  • Aged between 20 and 65 years
  • Being Chinese

Exclusion Criteria:

  • Aminotransferases aspartate or aminotransferases alanine > 80 IU/L, serum creatinine > 2.0 mg/dl,
  • Prolating or pregnant women, and patients with heart failure, acute myocardiac infarct, stroke and heavy injuries, and
  • Any other conditions not suitable for trial as evaluated by the physician.

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
Placebo Comparator: B
Dietary supplement: Green tea extract
main content is epigallocatechin gallate (EGCG, 58%)
Other Names:
  • A:GTE (500 mg) tid/day
  • B:Placebo (cellulose, 500 mg) tid/day
Experimental: A
Green tea extract
Dietary supplement: Green tea extract
main content is epigallocatechin gallate (EGCG, 58%)
Other Names:
  • A:GTE (500 mg) tid/day
  • B:Placebo (cellulose, 500 mg) tid/day

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Homeostasis model assessment for insulin resistance (HOMA-IR) was used as the major outcome measurement.
Time Frame: 16 weeks
16 weeks

Secondary Outcome Measures

Outcome Measure
Time Frame
HbA1C, blood sugar, creatinine, aminotransferases aspartate, aminotransferases alanine, uric acid, and plasma lipoproteins (triglyceride, cholesterol, cholesterol-HDL (HDL) and cholesterol-LDL (LDL)) cholesterol; BMI,WC---.
Time Frame: 16 weeks
16 weeks

Collaborators and Investigators

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

Sponsor

Taipei Hospital, Taiwan

Collaborators

National Science Council, Taiwan

Investigators

  • Study Chair: Chung-Hua Hsu, MD; PhD, Branch of Chinese Medicine, Taipei City Hospital

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

September 1, 2007

Primary Completion (Actual)

August 1, 2008

Study Completion (Actual)

August 1, 2008

Study Registration Dates

First Submitted

December 4, 2007

First Submitted That Met QC Criteria

December 4, 2007

First Posted (Estimate)

December 5, 2007

Study Record Updates

Last Update Posted (Estimate)

January 13, 2009

Last Update Submitted That Met QC Criteria

January 12, 2009

Last Verified

January 1, 2009

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Tpe-2007-IRB-05
  • NSC-96-2320-13-192-001

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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