Can a probiotic stop UTIs from coming back?
NCT ID NCT03366077
First seen Jun 24, 2026 · Last updated Jun 26, 2026 · Updated 1 time
Summary
This study tested whether taking a probiotic called Lactobacillus reuteri could reduce the number of repeat urinary tract infections (UTIs) in adult women who had recently finished antibiotic treatment for a UTI. 140 women with a history of recurrent UTIs took either the probiotic or a placebo daily for six months. Researchers tracked how many confirmed UTIs occurred during that time to see if the probiotic helped prevent them.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
probiotic (Lactobacillus reuteri)
What this could lead to
If it works, this could offer a natural way to help prevent repeat UTIs without relying on antibiotics.
What could go wrong
This is a small, completed study with 140 women, and probiotics may not work for everyone. Results may not apply to all women or different probiotic strains.
Disclaimer
Read more
Show less
This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for RECURRENT URINARY TRACT INFECTION IN ADULT WOMEN are added.
By submitting, you agree to our Terms of use
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.
Contacts and locations
Show contact details
Enter your email to view the contact information for this study.
By submitting, you agree to our Terms of use
Locations
-
Clinical Trial Consultants AB
Uppsala, 752 37, Sweden