Exploring treatments for Gulf War Illness-related gastrointestinal symptoms

Mechanisms of Gulf War Illness

Not applicable Interventional VA Office of Research and Development · NCT05972291

This study is testing if taking glutamine can help veterans with Gulf War Illness feel better by easing their stomach problems like pain and diarrhea.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment80 (estimated)
Ages18 Years to 65 Years
SexAll
SponsorVA Office of Research and Development Federal
Drugs / interventionschemotherapy
Locations1 site (Memphis, Tennessee)
Trial IDNCT05972291 on ClinicalTrials.gov

What this trial studies

This study investigates the chronic gastrointestinal symptoms experienced by veterans with Gulf War Illness, focusing on the potential benefits of oral glutamine supplementation. The research aims to understand the mechanisms behind these symptoms, which include abdominal pain, diarrhea, and bloating, and how glutamine may restore intestinal permeability. By conducting this trial, the investigators hope to provide a novel treatment option for veterans suffering from these debilitating symptoms, which currently lack effective therapies. The study will involve veterans aged 18-65 who meet specific eligibility criteria related to their gastrointestinal health.

Who should consider this trial

Good fit: Ideal candidates for this study are veterans aged 18-65 with Gulf War Illness and chronic gastrointestinal symptoms that began during their deployment.

Not a fit: Patients with a history of inflammatory bowel disease, lactose intolerance, or other specified gastrointestinal conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide a new treatment option for veterans suffering from chronic gastrointestinal symptoms related to Gulf War Illness.

How similar studies have performed: Previous studies have shown promising results with glutamine supplementation in similar gastrointestinal conditions, suggesting potential success for this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Veterans 18-65 years old with GWI and chronic GI symptoms (abdominal pain, diarrhea, bloating) that started during their deployment in the Persian Gulf
2. Veterans 18-65 years old with GWI and chronic GI symptoms (abdominal pain, diarrhea, bloating)
3. increased intestinal permeability on the lactulose/mannitol permeability test (ratio \>0.07)
4. able and willing to cooperate with the study

Exclusion Criteria:

1. current participation in another research protocol or unable to give informed consent
2. women with a positive urine pregnancy test or breastfeeding
3. history of inflammatory bowel disease, lactose intolerance and/or celiac sprue
4. \+ hydrogen breath test for bacterial overgrowth
5. \+ anti-endomysial antibody titer
6. use of NSAIDs 2 weeks before or during the study
7. known allergy to glutamine or whey protein
8. abdominal surgery except for removal of gallbladder, uterus, or appendix \>6 months prior to entry into the study
9. Abnormal serum BUN and/or creatinine
10. Mannitol recovery out of the normal range of 5-25 U/g
11. history of kidney disease
12. allergies to monosodium glutamate
13. current use of anti-seizure medications

Where this trial is running

Memphis, Tennessee

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Gulf War IllnessIrritable Bowel SyndromeGastrointestinal Symptomsgastrointestinalirritable bowel syndromeglutamine
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.