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.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 65 Years |
| Sex | All |
| Enrollment | 200 (estimated) |
| Sponsor | The President Stanisław Wojciechowski State University of Applied Sciences in Kalisz Academic / other |
| Locations | 3 sites (Jarocin and 2 other locations) |
| Status | Recruiting |
| Started | November 21, 2025 |
| Main results expected | December 2026 |
| Study ends | December 2027 |
| Registry record updated | December 15, 2025 |
| Trial ID | NCT07235215 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
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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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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.