Clinical trial Recruiting at 3 sites Interventional Ages 18 to 65

Daily Vivatlac synbiotic capsules for people with moderate-to-severe irritable bowel syndrome

Official title: Effects of Vivatlac Synbiotic in Patients With Irritable Bowel Syndrome - A Randomized, Double-blind, Placebo-Controlled, 36 Weeks Clinical Trial

Run by The President Stanisław Wojciechowski State University of Applied Sciences in Kalisz · NCT07235215 · Data updated 2026-11-12

This trial will test whether taking one daily Vivatlac synbiotic capsule helps adults with moderate-to-severe irritable bowel syndrome feel better over 36 weeks.

More Irritable Bowel Syndrome trials

Quick facts

Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment200 (estimated)
SponsorThe President Stanisław Wojciechowski State University of Applied Sciences in Kalisz
Academic / other
Locations3 sites (Jarocin and 2 other locations)
StatusRecruiting
StartedNovember 21, 2025
Main results expectedDecember 2026
Study endsDecember 2027
Registry record updatedDecember 15, 2025
Trial IDNCT07235215 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults diagnosed with IBS using the World Gastroenterology Organisation questionnaire who have moderate-to-severe symptoms (IBS-SSS ≥ 175) and are not currently taking probiotics or recent antibiotics are ideal candidates.

Probably not a fit

People who are pregnant, breastfeeding, have lactose intolerance, other chronic bowel diseases (like IBD or celiac), or who recently used antibiotics or probiotic products are unlikely to be eligible or benefit from this protocol.

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

What this trial studies

This is a multi-center, randomized, double-blind, placebo-controlled trial enrolling adults with IBS and an IBS-SSS score of 175 or higher. After a four-week screening period with a patient diary, participants are randomized to take one capsule per day of a nine-strain synbiotic (Vivatlac®) or matching placebo for 36 weeks. Each active capsule contains 4.5 × 10^9 CFU from nine probiotic strains plus 68 mg fructooligosaccharides (FOS). Treatment effects are measured primarily by changes in IBS symptom severity and stool characteristics using validated questionnaires and symptom diaries.

Why it matters

Potential benefit: If successful, the synbiotic could modestly reduce IBS symptom severity and improve stool patterns and quality of life for some patients.

How similar studies have gone: Previous trials of multi-strain probiotics and synbiotics in IBS have produced mixed but occasionally modest symptom improvements, so this approach has some supportive but not definitive evidence.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* diagnosed for Irritable Bowel Syndrome using the IBS questionnaire for Health Care Providers of the World Global Gastroenterology Organization
* IBS-SSS ≥ 175 points

Exclusion Criteria:

* patients currently taking products containing probiotics or have taken this kind of products during the last 3 months
* patients currently taking antibiotics or have taken antibiotics during the last 3 months
* patients having a concurrent severe illness (malignancies, uncontrolled hypertension or diabetes, hepatic, renal or cardiac dysfunctions, serious neurological disorders, psychosis, respiratory disorders such as asthma or COPD, hyper- or hypothyroidism
* patients having chronic bowel disorders other than IBS, including inflammatory bowel disease, gastroenteritis, stomach and duodenal cancer, celiac disease
* patient being pregnant, lactating, or planning to become pregnant during the next 9 months
* patient being diagnosed to have a lactose intolerance
* patients using motility drugs or dietary fiber supplements withing 2 weeks before study start
* patient taking anti-coagulant medication
* patients have participated in another clinical trial within the last three months

Where it's running

  • District Hospital Jarocin
    Jarocin, Poland
    Recruiting
  • GP Clinic Spitalna
    Jarocin, Poland
    Recruiting
  • GP Clinic Wroclawska
    Jarocin, Poland
    Recruiting

Study contacts

  • Principal investigator: Jacek Piatek, Prof. Dr. — The President Stanisław Wojciechowski State University of Applied Sciences in Kalisz
  • Study coordinator: Jacek Piatek, Prof. Dr.
  • Email: drpiatek@interia.eu
  • Phone: +48883389788

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

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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.