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Sponsors and Collaborators: |
Oregon Health and Science University University of Arizona |
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Information provided by: | Oregon Health and Science University |
ClinicalTrials.gov Identifier: | NCT00829218 |
Objective: Randomized, double blind, placebo-controlled, crossover, clinical trial to examine the effects of the food additive glutamate (in the form of MSG) on IBS and fibromyalgia. Setting and Subjects: The Fibromyalgia Research Database at OHSU will be utilized to identify and recruit fibromyalgia patients who also have IBS to OHSU study centers. Intervention: Approximately 60 male and female subjects aged 18-75 will be placed on a 1-month glutamate-free elimination diet. Those that respond positively to the diet (we are estimating 30-40 subjects), will then be randomized to receive either a citrus drink containing 5 grams of MSG; or placebo (the citrus drink alone)on three consecutive days one week apart. The investigators are hypothesizing that those who react positively to the elimination diet will have symptom occurrence statistically more frequently when given the glutamate challenge, than when given placebo.
Condition | Intervention |
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Irritable Bowel Syndrome Fibromyalgia |
Other: Glutamate additive-free diet Other: Placebo diet |
Study Type: | Interventional |
Study Design: | Prevention, Randomized, Double Blind (Subject, Investigator), Placebo Control, Crossover Assignment, Safety Study |
Official Title: | A Clinical Trial Examining the Effects of the Food Additive Glutamate on Irritable Bowel Syndrome and Fibromyalgia |
Estimated Enrollment: | 60 |
Study Start Date: | January 2009 |
Estimated Study Completion Date: | May 2010 |
Estimated Primary Completion Date: | November 2009 (Final data collection date for primary outcome measure) |
Arms | Assigned Interventions |
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1 - Glutamate challenge: Active Comparator
Glutamate challenge: After the one month glutamate free diet, subjects will receive 5 grams of glutamate for three days on one week and placebo for three days on the next week. Arm 1 is the 5 grams of glutamate which will be given in a mixed juice.
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Other: Glutamate additive-free diet
All subjects will follow a diet for one month where all foods containing the additive glutamate have been removed. At the end of the one month diet, subjects who have responded positively to the diet will go onto the challenge arms of the study, where they will be randomized to receive placebo (mixed juice alone) for three days on one week, and 5 grams of glutamate in the mixed juice for three days on the other week.
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2- Placebo: Placebo Comparator
Glutamate challenge: After the one month glutamate free diet, subjects will receive 5 grams of glutamate for three days on one week and placebo for three days on the next week. Arm 2 is the placebo arm, which will be juice with nothing added.
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Other: Glutamate additive-free diet
All subjects will follow a diet for one month where all foods containing the additive glutamate have been removed. At the end of the one month diet, subjects who have responded positively to the diet will go onto the challenge arms of the study, where they will be randomized to receive placebo (mixed juice alone) for three days on one week, and 5 grams of glutamate in the mixed juice for three days on the other week.
Other: Placebo diet
Juice with nothing added.
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Ages Eligible for Study: | 18 Years to 75 Years |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
Exclusion Criteria:
Contact: Kathleen F Holton, MPH, PhDc | 503-757-1578 | holtonk@ohsu.edu |
Contact: Kim D Jones, PhD | 503-494-3837 | joneskim@ohsu.edu |
United States, Oregon | |
Oregon Health & Science University | Recruiting |
Portland, Oregon, United States, 97238 | |
Principal Investigator: Kim D Jones, PhD | |
Sub-Investigator: Kathleen F Holton, MPH, PhDc |
Study Chair: | Douglas Taren, PhD | University of Arizona |
Principal Investigator: | Kathleen F Holton, MPH, PhDc | University of Arizona and Oregon Health & Science Univ. |
Study Director: | Kimberly D Jones, PhD | Oregon Health and Science University |
Responsible Party: | University of Arizona & Oregon Health & Science University ( Kathleen Holton, MPH, PhD candidate ) |
Study ID Numbers: | 4763 |
Study First Received: | January 23, 2009 |
Last Updated: | January 23, 2009 |
ClinicalTrials.gov Identifier: | NCT00829218 History of Changes |
Health Authority: | United States: Institutional Review Board |
Irritable Bowel Syndrome Fibromyalgia Glutamate Diet Food additives |
Fibromyalgia Myofascial Pain Syndromes Gastrointestinal Diseases Glutamic Acid Colonic Diseases Pain Rheumatic Diseases |
Intestinal Diseases Muscular Diseases Digestive System Diseases Musculoskeletal Diseases Neuromuscular Diseases Irritable Bowel Syndrome Colonic Diseases, Functional |
Disease Fibromyalgia Myofascial Pain Syndromes Gastrointestinal Diseases Nervous System Diseases Colonic Diseases Rheumatic Diseases Intestinal Diseases |
Pathologic Processes Digestive System Diseases Muscular Diseases Musculoskeletal Diseases Neuromuscular Diseases Syndrome Irritable Bowel Syndrome Colonic Diseases, Functional |