S. Boulardii [The Healthy Yeast]

Saccharomyces boulardii is a unique probiotic used to treat, and even prevent, many conditions of the gastrointestinal tract. It is one of the few probiotics not killed by antibiotics, and aids in maintaining healthy gut flora during and after antibiotic use. S. boulardii is an inexpensive, natural yeast that can easily pass through stomach acid, making its way to the intestinal tract where it’s needed. Consider taking S. boulardii if you’re on antibiotics, struggling with less-than-optimal digestion, or have IBS or C. diff.

S. Boulardii - Yeast In Bowl

S. Boulardii is a tropical species of yeast that functions like a probiotic. It comes from lychee and mangosteen, and is thought to be a strain of saccharomyces cerevisiae. Henri Boulard, a French scientist, is responsible for its discovery. This was back in 1923 so it’s been around awhile.

Antibiotics are life-saving, and, boy, aren’t we blessed to have them. However, there is a cost. Very effective against dangerous bacteria, no one can dispute the fact that antibiotics have saved countless lives. They have also disrupted the flora of countless GI tracts. Thank goodness for supplements that can repair, and prevent, the damage caused by antibiotic use.

Disclaimer: This article is strictly for informational purposes only and is not intended to be medical advice. Please be diligent and always do your own research in regard to any material I present on this site. 

S. Boulardii For Gut Repair

Antibiotics are certainly necessary at times. If you have no other choice but to use them, at least protect your intestinal health from fungal overgrowth by using S. boulardii in conjunction with your medication. Antibiotics are no respecter of bacteria – meaning, they wipe out the good and the bad, resulting in the ugly.

There are exceptions, however, as they do not kill Candida albicans, a yeast, native to the GI tract. During treatment, this normal yeast becomes opportunistic, adhering to intestinal membranes, causing leaky gut, inflammation, autoimmunity, and a host of other conditions. S. boulardii prevents compromised gut function, and replenishes crucial gut flora disrupted by a round of antibiotics.

C. Difficle And S. Boulardii

If you don’t know what Clostridium difficile is be glad. It’s a miserable, life-threatening bacterial infection caused by the C. diff bacterium. It is highly contagious, and frequently occurs after treatment with antibiotics. C. diff commonly affects immune-compromised patients in hospitals and other care facilities.

It causes severe diarrhea and inflammation of the colon. It is becoming increasingly common with the overuse of antibiotics, and is harder to treat. The most common symptom is frequent diarrhea. This may occur up to 15 times a day. Other warning signs include fever, nausea, dehydration. and weight loss. It can lead to Crohn’s Disease, Ulcerative Colitis, kidney failure, sepsis and even death.

S. Boulardii restores intestinal microflora disrupted through antibiotic use. Its biggest advantage in fighting dangerous infections, like C. diff, is the fact that it is not killed by antibiotics, making it safe to take during treatment. Not only does it clear the infection, it also boosts the immune system preventing future occurrences.

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Probiotics And Skin Health

Studies are showing promising results of S. boulardii for skin health, specifically non-cystic acne. In one study, 75% of patients receiving probiotic treatments improved considerably.

Some were completely healed. That’s pretty astounding. Skin conditions, such as, rosacea, psoriasis, and eczema are all inflammatory in nature, and indicative of deeper problems, such as, inflammation and infections in the gut. S. boulardii decreases inflammation, treats infections, and restores a depleted microbiota, all factors contributing to leaky gut, and which often manifest as skin problems. Healthy intestinal bacteria is important for eliminating the toxins and free radicals known to damage skin. This is a good case of treat the cause, alleviate the symptom.

Lactic acid production is good for the skin. S. boulardii increases lactic acid making it an effective tool in your skin-care arsenal. The skin has a microbiome just as the gut does, and can benefit from healthy yeast like S. boulardii.

 Benefits of S. Boulardii

  • Anti-inflammatory
  • Immune supporting – boosts SigA
  • Combats bacterial, fungal, and parasitic infections
  • Beneficial for IBD – Crohn’s Disease and Ulcerative Colitis
  • Relieves diarrhea
  • Calms symptoms of IBS
  • Promotes healthy digestion
  • Treats C. difficile, H. Pylori and Giardia
  • Is not destroyed by antibiotics
  • Supports skin health

How To Use This Amazing Probiotic

For use during antibiotic treatment, take two capsules two times daily to decrease yeast overgrowth. Continue supplementation for at least two weeks after treatment has ended.

Severe infections, such as, C. diff. require hefty doses of S. boulardii to push out the infection. For the first two weeks, take four capsules (3Xs) daily. Reduce the dosage to nine capsules a day – three (3Xs) daily for two weeks. For the remaining four weeks, reduce the dose again to six a day – two (3Xs) a day. A huge benefit of this probiotic is that it rarely causes a Herxheimer reaction. This is fortunate since these kinds of reactions are difficult for those already suffering from the effects of infection.

Buy S. boulardii here

Or a three-pack here

A daily dose to maintain beneficial flora and inhibit yeast overgrowth is one capsule twice daily. Take S. boulardii on an empty stomach, two hours away from antibiotics. You can open a capsule of S. boulardii and add it to your Neti pot to alleviate sinus infections.

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Key Points

S. boulardii is a probiotic yeast that combats pathogenic agents that cause disease in the intestinal tract.

If you have been on antibiotics, have IBS or IBD, struggle with digestion, or just want to reduce inflammation. S. boulardi can help.

Have you use S. boulardii? What condition were you treating? Let me know in the comments:)


(1) NCBI: Efficacy and safety of the probiotic Saccharomyces boulardii for the prevention and therapy of gastrointestinal disorders
(2) NCBI: Mechanism and therapeutic effects of Saccharomyces boulardii on experimental colitis in mice
(3) PubMed.gov: Diversity of Saccharomyces boulardii CNCM I-745 mechanisms of action against intestinal infections
(4) PubMed.gov:Saccharomyces boulardii CNCM I-745 Improves Intestinal Enzyme Function: A Trophic Effects Review
(7) Chinese Medical Journal:Protective effect of Saccharomyces boulardii on intestinal mucosal barrier of dextran sodium sulfate-induced colitis in mice
(8) Journals.plos.org: Characterization of the Probiotic Yeast Saccharomyces boulardii in the Healthy Mucosal Immune System

2 thoughts on “S. Boulardii [The Healthy Yeast]”

  1. I have never heard of S. Boulardii. I didn’t realize a probiotic, or healthy yeast, could have so many benefits. 

    Truth be told, I haven’t used probiotics before, but your post has opened my eyes to what they are all about. This is a well written post, and I have learned a lot. I’ll be bookmarking your website and this article in particular. Thank you!

    • Hi Payton,

      Many people aren’t aware of the benefits of S. Boulardii. It’s both a probiotic and a healthy yeast that is highly effective at crowding out unhealthy yeast and bacteria, as is the case with conditions, such as H. Pylori and C. diff. 

      Thanks for bookmarking my site and article. I’m glad you learned something from my post. 


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