A specific probiotic blend improved reported symptoms in adults with non-constipated IBS
The randomized trial favored the tested blend on symptom ratings, while recurrence during later follow-up and adverse-event rates did not differ significantly.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Adults with IBS without constipation reported more global symptom improvement with this specific probiotic blend than with placebo. Some symptom and quality-of-life gains persisted through treatment. However, later symptom recurrence and reported adverse events did not differ significantly between groups. The findings apply to the tested strains and patient group, not probiotics in general.
The abstract does not give the probiotic dose or define the response threshold. Nonsignificant recurrence and adverse-event comparisons do not establish equal long-term effectiveness or safety.
What researchers found
IBS Global Improvement Scale response
Probiotic versus placebo at day 28; p = 0.048.
Patient reports drove the result
Researchers assessed overall improvement, symptom severity and quality of life. Abdominal pain, bloating and several bowel symptoms improved earlier with the probiotic. The response percentage describes a symptom-rating outcome, rather than a cure for IBS.
Microbiota findings were mixed
Stool testing in a subset found no overall difference in microbiota between groups, although the authors reported enrichment of some genera. This leaves uncertainty about how the reported symptom changes relate to changes in gut microbes.
The original publication
Probiotic Blend of Lactobacillus acidophilus LA-5 and Bifidobacterium animalis ssp. Lactis BB-12 in Non-constipated Irritable Bowel Syndrome: A Double-Blind Randomized Placebo-Controlled Trial.
Ghoshal UC, Ramakrishna BS, Rathi PM et al.
J Gastroenterol Hepatol · 2026
- PubMed ID
- 41255078
- Record checked
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