Can a potato starch shake off Drug-Resistant gut bacteria?
NCT ID NCT07792915
First seen Aug 28, 2026 · Last updated Aug 28, 2026
Summary
This trial tests whether a dietary fiber called resistant potato starch can reduce the amount of drug-resistant bacteria living in the gut. The study enrolls Veterans who carry these bacteria without symptoms, and half will take the starch daily while the other half takes a placebo. Researchers will measure changes in gut bacteria and markers of gut health. If the starch works, it could offer a simple way to lower the risk of future infections.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Resistant potato starch (a dietary fiber prebiotic) taken as a powder mixed into food or drinks
- What this could lead to
- If it works, this could offer a simple, inexpensive way to reduce gut carriage of drug-resistant bacteria, lowering the risk of future infections.
- What could go wrong
- This is a Phase 2 trial with 120 participants, so results may not apply broadly. The fiber may cause digestive discomfort, and the effect on infection risk is not yet proven.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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About 120 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Jan 2027
An estimate. Start dates often move.
- Expected to finish
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Sep 2030
An estimate. End dates often move.
- Lead sponsor
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A government agency
The lead sponsor is a US federal agency other than the NIH.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Presence of C. difficile, Methicillin-resistant Staphylococcus aureus (MRSA), Vancomycin-resistant Enterococcus (VRE), and/or Multi-drug resistant Enterobacteriaceae (MDRE) in the gut as determined by a stool test * Ambulatory/not hospitalized at time of enrollment Exclusion Criteria: * Allergy to any ingredient or source material in intervention or placebo product * Severe gastrointestinal condition that may be exacerbated by high dietary fiber intake (history of bowel obstruction, intestinal strictures, diverticulitis, active inflammatory bowel disease with structuring, gastroparesis, and/or severe gastrointestinal motility disorders) * Uncontrolled diabetes (hospitalized in previous 5 years due to diabetes) * Dysphagia * Fecal microbiome transplant in the last 30 days * Intestinal surgery in the last 30 days * Pregnancy or breastfeeding * Immunosuppression, defined as history of solid organ transplant or as receipt of ablative chemotherapy, steroids at the equivalent of ≥5 mg/day prednisone, antimetabolites, anti-TNF agents, calcineurin inhibitors, or mycophenolate at time of enrollment * Use of probiotics or fiber supplements in previous 30 days * Already on a decolonization protocol * Active infection requiring acute antibiotic treatment
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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William S. Middleton Memorial Veterans Hospital, Madison, WI
Madison, Wisconsin, 53705-2254, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- New antibiotic CRS3123 takes on c. diff in early trial
- Gut bacteria capsules take on superbugs in antibiotic patients