What Is Saccharomyces Boulardii? Other Names: Saccharomyces Cerevisiae (Boulardii), S. Boulardii, SCB

What is Saccharomyces Boulardii?

This post was written with Consensus AI Academic Search Engine – please read our Disclaimer at the end of this article. Saccharomyces boulardii is a nonpathogenic yeast that has garnered significant attention for its probiotic properties. It is widely used in various therapeutic applications, particularly in gastrointestinal health. This article explores the characteristics, benefits, and clinical applications of Saccharomyces boulardii, supported by findings from multiple research studies. Other names include: Probiotic, Probiotique, Saccharomyces, Saccharomyces Boulardii CNCM I-745, Saccharomyces Boulardii HANSEN CBS 5926, Saccharomyces Boulardii Lyo CNCM I-745, Saccharomyces Boulardius, Saccharomyces Cerevisiae Boulardii, Saccharomyces Cerevisiae (Boulardii), Saccharomyces Cerevisiae (Boulardii) HANSEN CBS 5926, Saccharomyces Cerevisiae HANSEN CBS 5926, Saccharomyces cerevisiae var boulardii, S. Boulardii, SCB.

Characteristics of Saccharomyces Boulardii

Saccharomyces boulardii is a tropical strain of yeast that is distinct from the common baker’s yeast, Saccharomyces cerevisiae. It is known for its resilience to stomach acid and bile, which allows it to survive the gastrointestinal tract and exert its beneficial effects directly in the intestines1 2.

Clinical Applications of Saccharomyces Boulardii

Prevention of Antibiotic-Associated Diarrhea

One of the most well-documented uses of Saccharomyces boulardii is in the prevention of antibiotic-associated diarrhea (AAD). A prospective study demonstrated that the administration of S. boulardii significantly reduced the incidence of AAD in hospitalized patients from 22% in the placebo group to 9.5% in the treatment group1. Another study, however, did not find significant efficacy in preventing AAD, highlighting the need for further research to confirm these findings7.

Treatment of Acute Diarrhea

Saccharomyces boulardii has also been shown to be effective in treating acute diarrhea. In a randomized controlled study involving children in Myanmar, those treated with S. boulardii experienced a shorter duration of diarrhea and quicker normalization of stool consistency compared to the control group3. Similar results were observed in another study focusing on children under two years old, where S. boulardii significantly reduced the duration of acute infectious gastroenteritis6.

Ulcerative Colitis and Crohn’s Disease

Research has explored the potential benefits of S. boulardii in inflammatory bowel diseases such as ulcerative colitis (UC) and Crohn’s disease (CD). In a mouse model, S. boulardii was found to reduce UC carcinogenesis by lowering levels of inflammatory markers TNF-α and IL-6 and rebalancing intestinal microbiota4. However, a randomized controlled trial in humans found that S. boulardii did not prevent relapse in patients with Crohn’s disease in remission2.

Helicobacter pylori Eradication

Saccharomyces boulardii has been investigated for its role in improving the efficacy and reducing the side effects of Helicobacter pylori eradication therapy. A study found that S. boulardii supplementation during H. pylori treatment helped in reducing treatment-related side effects and potentially improved eradication rates5.

Modulation of Bile Acids and Microbiota

Saccharomyces boulardii has been shown to modulate fecal bile acids and microbiota composition during antimicrobial therapy. In a study involving healthy volunteers, S. boulardii prevented the decrease in secondary bile acids and the increase in cholic acid induced by antibiotics, suggesting a protective mechanism against Clostridium difficile infection8.

Psychological Stress and Serotonin Levels

Interestingly, S. boulardii may also have effects beyond the gastrointestinal tract. A study on healthy volunteers under psychological stress found that S. boulardii supplementation decreased salivary serotonin levels, indicating a potential role in stress response modulation9.

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Adverse Effects of Saccharomyces Boulardii

General Safety and Mild Adverse Effects

Saccharomyces boulardii is generally well-tolerated with no significant adverse effects reported in multiple studies1 2 3 4 5 6 7 8 9 10.

Most adverse events, when they occur, are mild and include symptoms such as epigastric pain, abdominal distention, dizziness, vomiting, and rash2.

Specific Adverse Effects

In studies involving patients with Helicobacter pylori, the addition of Saccharomyces boulardii did not significantly increase the frequency of adverse events compared to control groups1 2.

In a study on hospitalized patients, no discernable adverse effects were observed with the administration of Saccharomyces boulardii3.

In a study involving dogs, no short-term side effects were seen with the administration of Saccharomyces boulardii5.

Adverse Effects in Specific Conditions

In a study on patients with recurrent Clostridium difficile disease, no serious adverse reactions were observed with the use of Saccharomyces boulardii6.

In a study on preterm infants, no adverse effects related to Saccharomyces boulardii were observed10.

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How has Saccharomyces Boulardii Improved Patient Outcomes?

Reduction in Diarrhea Duration and Severity

Saccharomyces boulardii significantly reduced the duration and severity of diarrhea in children with acute infectious diarrhea, leading to shorter hospital and emergency care unit stays5 6.

In patients undergoing Helicobacter pylori eradication therapy, the addition of Saccharomyces boulardii reduced the incidence and duration of antibiotic-associated diarrhea3.

Improvement in Quality of Life for IBS Patients

Saccharomyces boulardii improved the quality of life in patients with diarrhea-predominant and mixed-type irritable bowel syndrome (IBS)2 4.

It also showed a significant decrease in proinflammatory cytokines and an increase in anti-inflammatory cytokines in IBS patients, contributing to better clinical outcomes4.

Effectiveness in Helicobacter pylori Eradication

While Saccharomyces boulardii did not significantly improve the overall eradication rates of Helicobacter pylori, it helped some patients avoid the need for additional bismuth quadruple therapy1.

It also ameliorated pre-eradication alimentary symptoms and reduced the side effects associated with the eradication therapy3.

Impact on Small Intestinal Bacterial Overgrowth (SIBO)

Saccharomyces boulardii, alone or in combination with metronidazole, improved gastrointestinal symptoms and reduced hydrogen levels in patients with systemic sclerosis and SIBO9.

Limited Effectiveness in Functional Constipation

Saccharomyces boulardii was not as effective as lactulose in treating childhood functional constipation, showing lower treatment success rates and higher drug change rates10.

No Significant Impact on Heart Failure

In patients with heart failure with reduced ejection fraction, Saccharomyces boulardii did not significantly improve left ventricular ejection fraction or other measured biomarkers7.

Reduction in Postoperative Inflammatory Response

Preoperative administration of Saccharomyces boulardii in patients undergoing colon resection reduced levels of certain inflammatory cytokines in the intestinal mucosa, although it did not significantly impact postoperative infection rates8.

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Saccharomyces Boulardii Mechanisms of Action

Modulation of Bile Acids and Microbiota

Saccharomyces boulardii helps modulate fecal bile acids, preventing the increase in cholic acid that promotes Clostridium difficile growth during antibiotic treatment1.

It alters the gut microbiota composition, increasing beneficial bacteria like Bacillus and Lactococcus while decreasing harmful ones such as Lachnoclostridium and Oscillibacter2 5.

Anti-inflammatory Effects

Saccharomyces boulardii reduces levels of pro-inflammatory cytokines such as TNF-α and IL-6, which are linked to ulcerative colitis and other inflammatory conditions2 4.

It also decreases systemic inflammation markers like IL-6 and lipopolysaccharide-binding protein (LBP) in HIV-treated patients, suggesting a role in reducing microbial translocation and chronic inflammation5.

Immune System Modulation

The yeast enhances mucosal immunity by increasing the expression of Toll-like receptors (TLRs) and cytokines such as IL-6, TNF-α, IL-10, and TGF-β in the intestinal epithelium4.

It boosts serum IgA and secretory IgA levels, indicating an enhanced immune response4.

Impact on Serotonin Levels

Saccharomyces boulardii decreases salivary serotonin levels under psychological stress, which may be linked to its potential antidepressant and pro-cognitive effects3.

Effect on Diarrhea

The probiotic shortens the duration of acute watery diarrhea and normalizes stool consistency and frequency in children, providing both social and economic benefits7.

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Common Complaints Associated with Saccharomyces Boulardii Use

General Safety and Lack of Adverse Effects

Multiple studies have reported no discernible adverse effects associated with the administration of Saccharomyces boulardii in hospitalized patients1 2.

Effectiveness in Reducing Diarrhea

Some studies have shown that Saccharomyces boulardii can reduce the incidence and severity of antibiotic-associated diarrhea and other gastrointestinal side effects when used in combination with other treatments1 4.

Ineffectiveness in Certain Populations

Other studies have found that Saccharomyces boulardii was not effective in preventing antibiotic-associated diarrhea in elderly hospitalized patients, indicating that its effectiveness may vary based on patient demographics2 3.

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Disclaimer

The content presented in this blog is generated by Consensus, an AI-powered academic search engine, and is based on publicly available scientific literature. While every effort is made to provide accurate, up-to-date, and well-researched information, the content is intended for informational and educational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making any decisions regarding medical conditions, treatments, or medications. The AI system’s analysis may not cover all perspectives, emerging research, or individual cases, and it is not a substitute for professional expertise. Neither the blog publisher nor the developers of the AI-powered search engine are responsible for any actions taken based on the information provided in this content. Use of this information is at your own risk. Citations to the original scientific studies are included for reference, but these studies should be reviewed in full and interpreted with the guidance of a healthcare or research professional.

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