Bifidobacterium breve for Irritable Bowel Syndrome (IBS)

Q: Does Bifidobacterium breve help with Irritable Bowel Syndrome (IBS)?

Based on 2 studies with 150 participants, there is preliminary evidence that needs more research that Bifidobacterium breve may support Irritable Bowel Syndrome (IBS) management. Our evidence grade is D (Very Early Research).

Q: How much Bifidobacterium breve should I take for Irritable Bowel Syndrome (IBS)?

Studies have used various dosages. A commonly studied range is 1-10 billion CFU/day. Always consult your healthcare provider before starting any supplement regimen.

Q: Are there side effects of Bifidobacterium breve?

Reported side effects may include Mild gas during initial use, Occasional loose stools in infants (transient), Rare abdominal discomfort, Very rare: bacteremia in immunocompromised individuals. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

Q: How strong is the evidence for Bifidobacterium breve and Irritable Bowel Syndrome (IBS)?

We rate the evidence as Grade D (Very Early Research). This rating is based on 2 peer-reviewed studies with 150 total participants. The overall direction of effect is positive.

Limited data from small studies. Preliminary evidence for symptom improvement.

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The Bottom Line

Limited data from small studies. Preliminary evidence for symptom improvement.

Key Study Findings

Review

Compendium of Bifidobacterium-based probiotics: characteristics and therapeutic impact on human diseases.

Dose: None vs: None Outcome: None Effect: None None

Population: None

Other n=1098 8 weeks Open-label

A multicenter real-world, open-label study assessing the impact of a probiotic mixture on symptoms of …

Dose: None vs: None (single-arm open-label) Outcome: Treatment success for abdominal pain and bloating Effect: 73% pain, 81.9% bloating success at T1 <0.001

Population: IBS patients from 52 Italian gastroenterologists

Randomized Controlled Trial n=61 8 weeks Double-blind

Eight weeks of treatment with probiotic Bifidobacterium breve, Bif195 lowers fatigue scores in patients with …

Dose: None vs: Placebo Outcome: IBS-SSS symptom severity score change Effect: None None

Population: Patients with moderate-severe diarrhea-predominant IBS

Randomized Controlled Trial 4 weeks

Efficacy of Quadruple-coated Probiotics in Patients With Irritable Bowel Syndrome: A Randomized, Double-blind, Placebo-controlled, Parallel-group …

Dose: 2 g vs: Placebo Outcome: Constipation symptoms Effect: None P = 0.005

Population: IBS patients

Review

Postbiotics: A new member in the biotics family.

Dose: None vs: None Outcome: Clinical applications overview Effect: None None

Population: General population (review)

In Vitro

Bowel Inflammation and Nutrient Supplementation: Effects of a Fixed Combination of Probiotics, Vitamins, and Herbal …

Dose: None vs: None Outcome: Colitis severity Effect: None None

Population: Crohn's disease patients

Key Statistics

Studies

150

Participants

↑

Positive

Grade

Referenced Papers

Compendium of Bifidobacterium-based probiotics: characteristics and therapeutic impact on human diseases. Review

Microbiome research reports 2025 16 citations

A multicenter real-world, open-label study assessing the impact of a probiotic mixture on symptoms of irritable bowel syndrome in adults. Other

Beneficial microbes 2025

Eight weeks of treatment with probiotic Bifidobacterium breve, Bif195 lowers fatigue scores in patients with diarrhoea-predominant irritable bowel syndrome: results … Other

Frontiers in nutrition 2025

Bowel Inflammation and Nutrient Supplementation: Effects of a Fixed Combination of Probiotics, Vitamins, and Herbal Extracts in an In Vitro … Other

The Yale journal … 2024 5 citations

Efficacy of Quadruple-coated Probiotics in Patients With Irritable Bowel Syndrome: A Randomized, Double-blind, Placebo-controlled, Parallel-group Study. Other

Journal of neurogastroenterology … 2024 4 citations

Postbiotics: A new member in the biotics family. Other

Archivos argentinos de … 2024 3 citations

Gut Microbiome Alterations Following Oral Serum-Derived Bovine Immunoglobulin Administration in the Management of Dysbiosis. Other

Cureus 2024 1 citations

Alternation of the gut microbiota in irritable bowel syndrome: an integrated analysis based on multicenter amplicon sequencing data. Other

Journal of translational … 2023 30 citations

Dose-Response Efficacy and Mechanisms of Orally Administered Bifidobacterium breve CCFM683 on IMQ-Induced Psoriasis in Mice. Other

Nutrients 2023 19 citations

Compositional Changes in the Gut Microbiota of Responders and Non-responders to Probiotic Treatment Among Patients With Diarrhea-predominant Irritable Bowel Syndrome: … Other

Journal of neurogastroenterology … 2022 21 citations

Immunomodulatory Effects of Bifidobacterium spp. and Use of Bifidobacterium breve and Bifidobacterium longum on Acute Diarrhea in Children. Other

Journal of microbiology … 2022 15 citations

Serpin-positive Bifidobacterium breve CNCM I-5644 improves intestinal permeability in two models of irritable bowel syndrome. Other

Scientific reports 2022 14 citations

Effectiveness of Probiotics in Children With Functional Abdominal Pain Disorders and Functional Constipation: A Systematic Review. Systematic Review

Journal of clinical … 2018 34 citations

Effect of administering a multi-species probiotic mixture on the changes in fecal microbiota and symptoms of irritable bowel syndrome: a … Other

Journal of clinical … 2015 62 citations

Effect of probiotic species on irritable bowel syndrome symptoms: A bring up to date meta-analysis. Meta-Analysis

Revista espanola de … 2013 102 citations

The effect of a multispecies probiotic mixture on the symptoms and fecal microbiota in diarrhea-dominant irritable bowel syndrome: a randomized, … RCT

Journal of clinical … 2012 207 citations

Bifidobacterium breve with α-linolenic acid and linoleic acid alters fatty acid metabolism in the maternal separation model of irritable bowel … Other

PloS one 2012 31 citations

BDNF expression in the hippocampus of maternally separated rats: does Bifidobacterium breve 6330 alter BDNF levels? Other

Beneficial microbes 2011 89 citations

The probiotic Bifidobacterium infantis 35624 displays visceral antinociceptive effects in the rat. Other

Neurogastroenterology and motility 2010 213 citations

Effect of a multispecies probiotic supplement on quantity of irritable bowel syndrome-related intestinal microbial phylotypes. RCT

BMC gastroenterology 2010 91 citations

Effects of multispecies probiotic supplementation on intestinal microbiota in irritable bowel syndrome. RCT

Alimentary pharmacology & … 2007 102 citations

Clinical studies on alleviating the symptoms of irritable bowel syndrome. RCT

Asia Pacific journal … 2006

A probiotic mixture alleviates symptoms in irritable bowel syndrome patients: a controlled 6-month intervention. RCT

Alimentary pharmacology & … 2005 398 citations

Probiotics in the treatment of irritable bowel syndrome. RCT

Journal of clinical … 2004 205 citations

Effects of probiotic administration upon the composition and enzymatic activity of human fecal microbiota in patients with irritable bowel syndrome … Other

Research in microbiology 2001 201 citations

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

Commonly Used Dosages

general:: 1-10 billion CFU/day
adultgisupport:: 5-10 billion CFU/day
neonatalsupport:: 1-5 billion CFU/day (as directed by pediatrician)

Upper limit: Well-tolerated up to 10 billion CFU/day in clinical trials

Dosages Studied in Research

Dosage	Duration	Effect	N
None	--	Mixed	--
None	8 weeks	Positive	1098
None	8 weeks	Neutral	61
2 g	4 weeks	Mixed	--
None	--	Positive	--
None	--	Positive	--
Serum-derived bovine immunoglobulin (SBI)	--	Positive	--
None	--	Positive	--

Best taken: Before meals or on empty stomach; for infants, mix with breast milk or formula

Safety & Side Effects

Reported Side Effects

⚠ Mild gas during initial use
⚠ Occasional loose stools in infants (transient)
⚠ Rare abdominal discomfort
⚠ Very rare: bacteremia in immunocompromised individuals

Known Interactions

● Antibiotics (may reduce probiotic viability; space dosing 2 hours apart)
● Immunosuppressants (use with caution in immunocompromised patients)

Tolerable upper intake: Well-tolerated up to 10 billion CFU/day in clinical trials

Always consult your healthcare provider before starting any supplement.

Frequently Asked Questions

Does Bifidobacterium breve help with Irritable Bowel Syndrome (IBS)?

Based on 2 studies with 150 participants, there is preliminary evidence that needs more research that Bifidobacterium breve may support Irritable Bowel Syndrome (IBS) management. Our evidence grade is D (Very Early Research).

How much Bifidobacterium breve should I take for Irritable Bowel Syndrome (IBS)?

Studies have used various dosages. A commonly studied range is 1-10 billion CFU/day. Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of Bifidobacterium breve?

Reported side effects may include Mild gas during initial use, Occasional loose stools in infants (transient), Rare abdominal discomfort, Very rare: bacteremia in immunocompromised individuals. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

How strong is the evidence for Bifidobacterium breve and Irritable Bowel Syndrome (IBS)?

We rate the evidence as Grade D (Very Early Research). This rating is based on 2 peer-reviewed studies with 150 total participants. The overall direction of effect is positive.

Related Evidence

Other ingredients for Irritable Bowel Syndrome (IBS)

Peppermint Oil A Lactobacillus rhamnosus GG B Psyllium Husk B Lactobacillus plantarum B Partially Hydrolyzed Guar Gum (PHGG) B Bifidobacterium longum B

Quick Verdict

Limited data from small studies. Preliminary evidence for symptom improvement.

Evidence Strength30%

Low confidence

Study Breakdown

RCT (6)Meta (1)Other (0)

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Learn More

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.