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Trial to Evaluate Dietary Supplements to Maintain Gut Health During Travel

Launched by HENRY M. JACKSON FOUNDATION FOR THE ADVANCEMENT OF MILITARY MEDICINE · Oct 23, 2020

Trial Information

Current as of June 26, 2025

Recruiting

Keywords

Diarrhea, Prevention, Deployment, Supplements

ClinConnect Summary

This clinical trial is studying a dietary supplement called Travelan® to see if it can help maintain gut health and prevent diarrhea while traveling. Researchers want to find out if this supplement can keep your digestive system functioning normally when you’re away from home, especially in places that may pose a higher risk for gut issues. Participants will be compared to a group taking a placebo, which is a harmless substance that looks like the supplement but has no active ingredients.

To be eligible for this trial, you need to be between 18 and 70 years old, able to read and speak English, and planning to travel for at least 10 days to a location that might disrupt gut health. You will need to provide a stool sample before starting the supplement and be willing to follow up after your trip. However, if you have certain gastrointestinal conditions, have taken antibiotics recently, or plan to use other gut health medications during the study, you may not qualify. Participants can expect guidance throughout the trial and will help contribute to important research on maintaining gut health during travel.

Gender

ALL

Eligibility criteria

  • Inclusion Criteria:
  • 18-70 years old, able to read and speak English fluently and provide informed consent
  • Travel or deployment with minimum of 10 consecutive days at intermediate to high risk for GH disruption destination (not counting quarantine period)
  • Ability to complete a follow-up visit following return from travel
  • Ability to provide a stool sample prior to start of prophylaxis
  • Willingness to comply with study procedures
  • Exclusion Criteria:
  • Subject-reported history of any known functional bowel disorder (including Irritable Bowel Syndrome) or chronic gastrointestinal disease (e.g. Inflammatory Bowel Disease) which in the opinion of the investigator would preclude assessment of study outcomes
  • Antibiotic use within 7 days prior to start of prophylaxis (except for malaria prophylaxis including doxycycline, chloroquine, atovaquone/proguanil, mefloquine, primaquine, and tafenoquine)
  • Experiencing diarrheal illness (defined as 3 or more loose/liquid stools in a 24 hour period) within 3 days prior to start of prophylaxis
  • Planned use of any investigational or non-registered drug, antibiotic or other probiotics or prebiotics (outside of the study product) during the study period. This does not include consumption of yogurt products
  • Intended use of a GH disruption prophylactic (e.g. Pepto-Bismol, rifaximin) during the study period
  • Any planned medication usage during the study period that is deemed by the PI to interfere with GI function including but not limited to anti-diarrheals and prokinetics
  • Any confirmed or suspected cancer, or use of immunosuppressant medication (topical steroids are permitted) in the last 6 months which in the opinion of the investigator would impair interpretation of the study data

About Henry M. Jackson Foundation For The Advancement Of Military Medicine

The Henry M. Jackson Foundation for the Advancement of Military Medicine (HJF) is a non-profit organization dedicated to advancing military medicine through research, education, and innovation. Established in 1983, HJF collaborates with the U.S. military, academic institutions, and industry partners to facilitate the development and implementation of medical solutions that enhance the health and well-being of service members and their families. Through its support of clinical trials and scientific research initiatives, HJF plays a pivotal role in translating cutting-edge medical discoveries into effective treatments, ultimately contributing to the improvement of healthcare delivery within military and civilian populations.

Locations

Honolulu, Hawaii, United States

Tacoma, Washington, United States

San Diego, California, United States

Portsmouth, Virginia, United States

Camp Lejeune, North Carolina, United States

New York, New York, United States

Birmingham, , United Kingdom

Liverpool, , United Kingdom

Patients applied

0 patients applied

Trial Officials

David R Tribble, MD, DrPH

Principal Investigator

Infectious Disease Clinical Research Program, Uniformed Services University of the Health Sciences

Timeline

First submit

Trial launched

Trial updated

Estimated completion

Not reported

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