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Green Tea in Crohn's Disease

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified May 2010 by University Hospital Heidelberg.
Recruitment status was:  Recruiting
Information provided by:
University Hospital Heidelberg Identifier:
First received: October 27, 2010
Last updated: October 29, 2010
Last verified: May 2010
The purpose of this study is to assess whether green tea or coffee influence the course and life quality of patients with mild to moderately active Crohn's disease.

Condition Intervention
Crohn's Disease Other: Green tea (Camellia sinensis) Other: Coffee

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Supportive Care

Resource links provided by NLM:

Further study details as provided by University Hospital Heidelberg:

Primary Outcome Measures:
  • Crohn's Disease Activity Index [ Time Frame: week 16 ]
    Assessment of clinical activity

Secondary Outcome Measures:
  • Harvey-Bradshaw-Index [ Time Frame: week 16 ]
    Assessment of clinical activity

  • Inflammatory Bowel Disease Questionnaire [ Time Frame: week 16 ]
    Assessment of Life Quality

Estimated Enrollment: 80
Study Start Date: October 2010
Arms Assigned Interventions
green (or white) tea
Patients are recommended to drink green (or white) tea but are not allowed to consume any coffee
Other: Green tea (Camellia sinensis)
Patients are recommended to drink at least 5 cups of green tea per day
Patients are recommended to drink coffee but are not allowed to consume any tea
Other: Coffee
Patients are recommended to drink as much coffee as they tolerate.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Women and men ≥ 18 years with signed informed consent,
  • Patients with proven Crohn's disease,
  • Chronic-active course ≥ 3 months,
  • Current CDAI ≥ 150 and ≤ 350,
  • All medications for Crohn's disease have to be on a constant dosage for at least 4 weeks prior to study entry (i.e. 5-ASA, steroids),
  • Ability of the participant to understand character and individual consequences of the study.

Exclusion Criteria:

  • Pregnancy or the wish to become pregnant, breastfeeding,
  • Concomitant treatment with methotrexate, azathioprine or 6-mercaptopurine for < 3 months,
  • Treatment with TNF-alpha-antagonists, cyclosporine or tacrolimus < 4 weeks prior to study entry,
  • Participation in another study within the last 4 weeks,
  • Ulcerative colitis or indeterminate colitis,
  • Infectious colitis, including cytomegalovirus or Clostridium difficile induced colitis,
  • Colitis for other reasons like known diverticulitis, radiation colitis, ischemic colitis or microscopic colitis,
  • Malabsorption syndromes, lactose intolerance, celiac disease, exocrine pancreas insufficiency,
  • Bleeding hemorrhoids,
  • Other inflammatory or bleeding disorders of the colon and intestine, or diseases that may cause diarrhea or gastrointestinal bleeding,
  • Intolerance / aversion to tea and/or coffee,
  • Current treatment with antibiotics.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01231217

Contact: Anja Hanemann, MS 00496221568701
Contact: Max Karner, MD

University Hospital Heidelberg Recruiting
Heidelberg, Germany, 69120
Contact: Anja Hanemann, MS    00496221568701   
Sponsors and Collaborators
University Hospital Heidelberg
Principal Investigator: Max Karner, MD University Hospital Heidelberg
  More Information Identifier: NCT01231217     History of Changes
Other Study ID Numbers: GTCD-01
Study First Received: October 27, 2010
Last Updated: October 29, 2010

Additional relevant MeSH terms:
Crohn Disease
Inflammatory Bowel Diseases
Gastrointestinal Diseases
Digestive System Diseases
Intestinal Diseases processed this record on September 21, 2017