Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 50 to 85

Using resistant potato starch to help veterans with Gulf War Illness

Official title: BCCMA: Targeting Gut-Microbiome in Veterans Deployment Related Gastrointestinal and Liver Diseases; CMA5- Functional Metagenomics in GWI-related Gut Dysfunction

Run by VA Office of Research and Development · NCT05820893 · Data updated 2026-11-12

This study is testing if a special type of potato starch can help improve the gut health and overall quality of life for veterans dealing with Gulf War Illness.

Quick facts

PhasePhase 2
Study typeInterventional
Ages50 Years to 85 Years
SexAll
Enrollment52 (estimated)
SponsorVA Office of Research and Development
Federal
Locations1 site (Madison, Wisconsin)
StatusRecruiting
StartedFebruary 3, 2025
Main results expectedJune 30, 2027
Study endsJune 30, 2028
Registry record updatedMay 6, 2026
Trial IDNCT05820893 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are veterans aged 45-80 who have been diagnosed with Gulf War Illness and experience gastrointestinal symptoms.

Probably not a fit

Patients who have had a known SARS-CoV-2 infection in the last 60 days or are experiencing post-acute sequelae of COVID-19 may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial aims to evaluate the effectiveness of a dietary fiber prebiotic supplement, specifically resistant potato starch, in improving the quality of life for veterans suffering from Gulf War Illness (GWI). GWI affects a significant portion of veterans, leading to various debilitating symptoms, particularly gastrointestinal issues. The study will involve participants who meet specific criteria, including having gut-related symptoms associated with GWI, and will require them to provide blood and stool samples. The intervention seeks to restore gut microbiota balance, which may alleviate some of the symptoms experienced by these veterans.

Why it matters

Potential benefit: If successful, this intervention could significantly improve the quality of life for veterans suffering from Gulf War Illness by alleviating gastrointestinal and other related symptoms.

How similar studies have gone: While there is limited research specifically targeting GWI with prebiotics, studies on gut microbiota and dietary interventions have shown promise in other gastrointestinal conditions, suggesting potential for success in this novel approach.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Ability to provide informed written consent
2. Willing to comply with all study procedures and be available for the duration of the study (including providing stool samples)
3. Meeting the modified Kansas GWI case definition\* with gut symptoms endorsed
4. Deployed to Persian Gulf during Operations Desert Storm or Desert Shield56.Aged 50-85 years old

   * Moderate to severe GWI symptoms lasting at least 6 months in a minimum of three of the six symptom domains (one of which must be fatigue). The symptom domains are:

     * Pain (joint pain, muscle pain)
     * Gastrointestinal (diarrhea, nausea, vomiting, cramping)
     * Respiratory (persistent cough, wheezing)
     * Skin (rashes)
     * Fatigue (sleep problems, fatigue)
     * Neurologic (memory problems, headaches, dizziness, mood changes)

Exclusion Criteria:

1. A Known SARS-CoV-2 infection in the last 60 days and/or with a diagnosis of post-acute sequelae of COVID-19 (PASC, sometimes called long COVID) defined as COVID-19 symptoms lasting for greater than 6 months.
2. Subjects identified as, or appearing to, lack consent capacity
3. Alcohol abuse (greater than 14 drinks per week for men and 7 drinks per week for women)
4. Use of investigational drugs, biologics, or devices within 30 days prior to randomization.
5. Individuals who are pregnant, lactating or planning on becoming pregnant during the study.
6. Diagnosed inflammatory bowel disease, Crohn's disease, or Celiac's disease
7. Uncontrolled/untreated hypothyroidism
8. Previous gastrointestinal surgery (colorectal surgery, gastric bypass, intestinal resection)
9. Systemic antibiotics in the last 30 days
10. Fecal microbiota transplant in the last 30 days
11. Active dysphagia
12. Allergies to any of the ingredients in MSPrebiotic
13. Use of immunomodulatory medications in the last 30 days
14. Any other factor, condition, or medication not listed above the Investigators believe will affect the response in the gut or the interpretation of results.

Where it's running

  • William S. Middleton Memorial Veterans Hospital, Madison, WI
    Madison, Wisconsin, United States
    Recruiting

Study contacts

  • Principal investigator: Nasia Safdar, MD PhD — William S. Middleton Memorial Veterans Hospital, Madison, WI
  • Study coordinator: Nasia Safdar, MD PhD
  • Email: Nasia.Safdar@va.gov
  • Phone: (608) 280-7007

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • Using machine learning to guide rTMS for Gulf War Illness–related headaches and body pain

    This trial will try using a machine learning model on resting brain scans to predict which active rTMS treatment will best reduce headaches and body pain in veterans with Gulf War Illness.

    Recruiting Veterans Medical Research Foundation · San Diego, California · NCT07325513

  • Exploring treatments for Gulf War Illness-related gastrointestinal symptoms

    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.

    Recruiting VA Office of Research and Development · Memphis, Tennessee · NCT05972291

  • Identifying blood biomarkers for Gulf War Illness

    This study is trying to find specific blood markers in veterans with Gulf War Illness to see how they relate to memory problems and other brain issues.

    Recruiting at 3 sites Roskamp Institute Inc. · Palo Alto, California and 2 other locations · NCT05736146

  • Investigating Gulf War Illness in Veterans

    This study is trying to understand how Gulf War Illness affects veterans by comparing those who have it with those who don’t through a two-week health evaluation.

    Recruiting National Institutes of Health Clinical Center (CC) · Bethesda, Maryland · NCT05375812

  • Butyrate treatment for Gulf War Illness

    This study is testing if a butyrate treatment can help improve physical function and reduce symptoms in Veterans with Gulf War Illness.

    Recruiting at 3 sites Phase 2 VA Office of Research and Development · Long Beach, California and 2 other locations · NCT05367245

  • Testing Nicotinamide Riboside for Gulf War Illness

    This study is testing if taking Nicotinamide Riboside can help veterans with Gulf War Illness feel better by boosting their energy levels and improving symptoms like fatigue and memory problems.

    Recruiting at 2 sites Roskamp Institute Inc. · Fort Lauderdale, Florida and 1 other locations · NCT05243290

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.