Overview

SCIENTIFIC SCORE
Possibly Effective
Based on 28 Researches
7.9
USERS' SCORE
Good
Based on 342 Reviews
8.3
Supplement Facts
Serving Size: 1 Capsule
Amount Per Serving
%DV
Saccharomyces boulardii(an S. cerevisiae Strain)
250 mg(5 Billion CFU)
MOS Yeast Fraction(Min. 35% Manno-oligosaccharides [MOS]) (S. cerevisiae)
200 mg

Top Medical Research Studies

9.5
Probiotic effectively reduces diarrhea
We investigated the effectiveness of the probiotic Saccharomyces boulardii CNCM I-745 in real-world settings for treating diarrhea. In a study involving over 30,000 patients, those treated with S. boulardii had a notable success rate of 77.8% in resolving their diarrhea, compared to just 15.8% in the control group.

This study showed that S. boulardii worked well even when patients were on antibiotics, outperforming traditional anti-diarrheal treatments.

Overall, S. boulardii demonstrates significant promise in managing diarrhea effectively.
Read More
9
Probiotics mitigate antibiotic-related diarrhea
We looked into how probiotics, especially Saccharomyces boulardii CNCM I-745, can impact antibiotic-associated diarrhea. Through systematic reviews and clinical trials, we found that this yeast is effective in preventing and resolving diarrhea linked to antibiotic use. Since it isn't affected by antibiotics, S. boulardii can safely be administered at the start of treatment or within the first couple of days. This shows that using the right probiotics can help restore gut health after antibiotics, which is crucial for overall well-being.
Read More
We explored the effects of Saccharomyces boulardii on diarrhea caused by the cancer drug abemaciclib in a study involving thirty rats. The rats were divided into three groups: a control group, a group receiving only abemaciclib, and a group receiving both abemaciclib and Saccharomyces boulardii.

Our results indicated that the group treated with Saccharomyces boulardii showed a significant reduction in diarrhea severity and weight loss compared to the group that only received abemaciclib. Furthermore, histopathological evaluations revealed less inflammation in the Saccharomyces boulardii group. Overall, this suggests that Saccharomyces boulardii might be a beneficial treatment option to alleviate chemotherapy-induced diarrhea.
Read More

Most Useful Reviews

9
Quickly alleviates diarrhea
561 people found this helpful
Boulardy saccharomycetes are a must-have for any home. After my father suffered from severe diarrhea owing to antibiotic treatment, I persuaded the doctor to prescribe this probiotic. Remarkably, his condition improved to a normal stool within a day. My kitten also benefited from these capsules, and it resolved her digestive issues quickly. Even during my pregnancy, these helped alleviate my nighttime heartburn. Boulardi is invaluable for everyone, and I recommend it for effective relief from diarrhea and digestive issues.
Read More
9
Vital for correction
556 people found this helpful
I have found Saccharomyces Boulardii essential for combatting Clostridium Difficile. This probiotic not only helps eliminate harmful microbes but also prevents them from attaching to the intestinal lining, crucial for restoring gut health.
Read More
9
Caught my attention
264 people found this helpful
When S. boulardii is the right one, it's the only one you need. My gut symptoms, including diarrhea and bloating, improved remarkably after switching to a targeted probiotic protocol.
Read More

Medical Researches

SCIENTIFIC SCORE
Possibly Effective
Based on 28 Researches
7.9
  • All Researches
9.5
Probiotic effectively reduces diarrhea
We investigated the effectiveness of the probiotic Saccharomyces boulardii CNCM I-745 in real-world settings for treating diarrhea. In a study involving over 30,000 patients, those treated with S. boulardii had a notable success rate of 77.8% in resolving their diarrhea, compared to just 15.8% in the control group.

This study showed that S. boulardii worked well even when patients were on antibiotics, outperforming traditional anti-diarrheal treatments.

Overall, S. boulardii demonstrates significant promise in managing diarrhea effectively.
Read More
9
Probiotic reduces antibiotic-associated diarrhea
We examined how a high-dose, multistrain probiotic mix called Sinquanon helps prevent antibiotic-associated diarrhea (AAD) in adults taking broad-spectrum antibiotics. This well-structured clinical trial involved 564 participants, half receiving the probiotic and half a placebo.

Results showed that fewer people in the probiotic group experienced AAD—only 9.2% compared to 25.3% in the placebo group. This promising improvement suggests that Sinquanon may significantly enhance gastrointestinal health during antibiotic treatment without causing harmful side effects.
Read More
9
Probiotics mitigate antibiotic-related diarrhea
We looked into how probiotics, especially Saccharomyces boulardii CNCM I-745, can impact antibiotic-associated diarrhea. Through systematic reviews and clinical trials, we found that this yeast is effective in preventing and resolving diarrhea linked to antibiotic use. Since it isn't affected by antibiotics, S. boulardii can safely be administered at the start of treatment or within the first couple of days. This shows that using the right probiotics can help restore gut health after antibiotics, which is crucial for overall well-being.
Read More
9
Probiotics show potential for AAD
We looked into how probiotics might help manage antibiotic-associated diarrhea (AAD) in children through a review of systematic reviews. Our review considered various databases and included 20 studies, evaluating their reporting quality and overall evidence strength. While we found that higher doses of probiotics show promise in preventing AAD, caution is needed as many studies had significant quality gaps. Overall, probiotics could benefit kids facing AAD, but more robust research is essential for clearer recommendations.
Read More
We explored the effects of Saccharomyces boulardii on diarrhea caused by the cancer drug abemaciclib in a study involving thirty rats. The rats were divided into three groups: a control group, a group receiving only abemaciclib, and a group receiving both abemaciclib and Saccharomyces boulardii.

Our results indicated that the group treated with Saccharomyces boulardii showed a significant reduction in diarrhea severity and weight loss compared to the group that only received abemaciclib. Furthermore, histopathological evaluations revealed less inflammation in the Saccharomyces boulardii group. Overall, this suggests that Saccharomyces boulardii might be a beneficial treatment option to alleviate chemotherapy-induced diarrhea.
Read More

User Reviews

USERS' SCORE
Good
Based on 342 Reviews
8.3
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9
Quickly alleviates diarrhea
561 people found this helpful
Boulardy saccharomycetes are a must-have for any home. After my father suffered from severe diarrhea owing to antibiotic treatment, I persuaded the doctor to prescribe this probiotic. Remarkably, his condition improved to a normal stool within a day. My kitten also benefited from these capsules, and it resolved her digestive issues quickly. Even during my pregnancy, these helped alleviate my nighttime heartburn. Boulardi is invaluable for everyone, and I recommend it for effective relief from diarrhea and digestive issues.
Read More
9
Vital for correction
556 people found this helpful
I have found Saccharomyces Boulardii essential for combatting Clostridium Difficile. This probiotic not only helps eliminate harmful microbes but also prevents them from attaching to the intestinal lining, crucial for restoring gut health.
Read More
9
Caught my attention
264 people found this helpful
When S. boulardii is the right one, it's the only one you need. My gut symptoms, including diarrhea and bloating, improved remarkably after switching to a targeted probiotic protocol.
Read More
9
Alleviates irritable bowel
218 people found this helpful
Jarrow Formulas saccharomycetes are a fantastic alternative to bacterial probiotics. They pass through the digestive system unscathed, helping with conditions such as acne and irritable bowel syndrome. I always carry it when I travel, as it is highly effective in treating diarrhoea and maintaining gut health. I recommend it wholeheartedly!
Read More
9
Neutralises diarrhoea pathogens
218 people found this helpful
Saccharomyces Boulardii effectively combats pathogenic microorganisms in the gut, neutralising toxins and preventing infections. They are non-absorbed and do not disrupt beneficial gut flora. The World Gastroenterological Organization endorses their use for diarrhoea treatment. Highly effective!
Read More

Frequently Asked Questions

9
Quickly alleviates diarrhea
561 people found this helpful
Boulardy saccharomycetes are a must-have for any home. After my father suffered from severe diarrhea owing to antibiotic treatment, I persuaded the doctor to prescribe this probiotic. Remarkably, his condition improved to a normal stool within a day. My kitten also benefited from these capsules, and it resolved her digestive issues quickly. Even during my pregnancy, these helped alleviate my nighttime heartburn. Boulardi is invaluable for everyone, and I recommend it for effective relief from diarrhea and digestive issues.
9
Restores gut health
33 people found this helpful
I started taking Bulardi saccharomycetes after a rotavirus infection, which had caused prolonged diarrhoea. I noticed significant improvements within days. They also helped us recover during an illness and are perfect for counteracting the negative effects of antibiotics.
9
Helpful during travel
54 people found this helpful
I take Bulardi's saccharomycetes on all trips, as they are just like the pharmacy drug Enterol. They are effective in adult gastrointestinal issues, and I've used them for my child during vomiting, alongside sorbents. The effect is typically seen within a day, and it normalises function effectively.
9
Neutralises diarrhoea pathogens
218 people found this helpful
Saccharomyces Boulardii effectively combats pathogenic microorganisms in the gut, neutralising toxins and preventing infections. They are non-absorbed and do not disrupt beneficial gut flora. The World Gastroenterological Organization endorses their use for diarrhoea treatment. Highly effective!
10
Long-term diarrhea relief
25 people found this helpful
I have struggled with diarrhea for ten years and tried numerous remedies without success until I tried this product. It has completely relieved my symptoms and I am now free from diarrhea! I am incredibly grateful to have found something that truly works.
9
Must-have for travel
23 people found this helpful
This product is a must-have in our first aid kit, especially during travel. It effectively reduces toxins and prevents harmful bacteria from adhering to the intestinal lining. It supports digestive function and has a positive impact on immune health, making it great for preventing diarrhea.
9
Better than alternatives
51 people found this helpful
I bought this for stomach upsets. When my children had diarrhoea, I opened the capsule and gave it in powder form. It was more effective than smecta, with no resulting constipation. It worked very well.
9
Effective for diarrhea
31 people found this helpful
From experiencing diarrhea and giardia, this drug has been very helpful. I took two or three capsules over a couple of days, and it effectively addressed my diarrhea, regardless of the cause. I also managed to eliminate lamblia, which had weakened my liver. This product worked wonders for my digestive health.
9
Protects against diarrhoea
202 people found this helpful
S. boulardii is a highly regarded probiotic ideal for supporting gut health. It’s beneficial for all types of diarrhoea, especially after antibiotics, as it helps prevent pathogens while being gently excreted without disrupting gut flora.
9.5
Probiotic effectively reduces diarrhea
We investigated the effectiveness of the probiotic Saccharomyces boulardii CNCM I-745 in real-world settings for treating diarrhea. In a study involving over 30,000 patients, those treated with S. boulardii had a notable success rate of 77.8% in resolving their diarrhea, compared to just 15.8% in the control group.

This study showed that S. boulardii worked well even when patients were on antibiotics, outperforming traditional anti-diarrheal treatments.

Overall, S. boulardii demonstrates significant promise in managing diarrhea effectively.
8
Saccharomyces boulardii aids IBS-D
We investigated the impact of Saccharomyces boulardii CNCM I-745 combined with dietary advice in patients suffering from diarrhea-predominant irritable bowel syndrome (IBS-D). This randomized open-label study showed that the treatment helped reduce bacterial overgrowth and improved digestive symptoms over 15 days.

Participants receiving S. boulardii noticed a decrease in diarrhea and better overall symptom scores compared to those who received dietary advice alone. Notably, a particular beneficial bacteria, F. prausnitzii, became more abundant in those receiving the treatment, signaling possible positive shifts in the gut microbiota.
8
Probiotics effective for pediatric diarrhea
We explored whether probiotics, particularly Saccharomyces boulardii, are effective for treating various digestive disorders in children. The findings suggest that S. boulardii is beneficial for acute gastroenteritis, antibiotic-associated diarrhea, and Clostridium difficile infections. However, its efficacy for conditions like functional constipation and gastroesophageal reflux disease remains questionable.

While S. boulardii shows promise for other conditions like infantile colic, evidence quality is inconsistent. The study emphasizes that while probiotics can aid in treatment, they should not replace core dietary management strategies.
9
Probiotics mitigate antibiotic-related diarrhea
We looked into how probiotics, especially Saccharomyces boulardii CNCM I-745, can impact antibiotic-associated diarrhea. Through systematic reviews and clinical trials, we found that this yeast is effective in preventing and resolving diarrhea linked to antibiotic use. Since it isn't affected by antibiotics, S. boulardii can safely be administered at the start of treatment or within the first couple of days. This shows that using the right probiotics can help restore gut health after antibiotics, which is crucial for overall well-being.

References

  1. Li M, Xie Y. Efficacy and safety of as an adjuvant therapy for the eradication of : a meta-analysis. Front Cell Infect Microbiol. 2025;15:1441185. 10.3389/fcimb.2025.1441185
  2. Girard P, Verleye M, Castagné V. Serotoninergic Mechanisms of Action in the Relaxant Properties of Saccharomyces boulardii CNCM I-745 on the Intestine. Dig Dis Sci. 2025;70:191. 10.1007/s10620-024-08786-y
  3. Gwee KA, Lee WRW, Chua Q, Chiou FK, Aw MM, et al. The evidence for probiotics in the treatment of digestive disorders in the pediatric population. J Gastroenterol Hepatol. 2025;40:41. 10.1111/jgh.16809
  4. Hodzhev V, Dzhambazov K, Sapundziev N, Encheva M, Todorov S, et al. High-dose Probiotic Mix of spp., spp., , and to Prevent Antibiotic-associated Diarrhea in Adults: A Multicenter, Randomized, Double-blind, Placebo-controlled Trial (SPAADA). Open Forum Infect Dis. 2024;11:ofae615. 10.1093/ofid/ofae615
  5. Chen Y, Teng T, Su Y, Chen WZ. The effect of supplementing with on bismuth quadruple therapy for eradicating : a systematic review and meta-analysis of randomized controlled trials. Front Med (Lausanne). 2024;11:1344702. 10.3389/fmed.2024.1344702
  6. Pal BB, Bandagi RV, Pebbili KK, Rathod R, Kotak B, et al. Effectiveness of Saccharomyces boulardii CNCM I-745 in Adult Indian Patients with Diarrhoea: A Real-world, Multicentre, Retrospective, Comparative Study. Drugs Real World Outcomes. 2024;11:309. 10.1007/s40801-024-00424-3
  7. Alharbi BF, Alateek AA. Investigating the influence of probiotics in preventing Traveler's diarrhea: Meta-analysis based systematic review. Travel Med Infect Dis. 2024;59:102703. 10.1016/j.tmaid.2024.102703
  8. Waitzberg D, Guarner F, Hojsak I, Ianiro G, Polk DB, et al. Can the Evidence-Based Use of Probiotics (Notably Saccharomyces boulardii CNCM I-745 and Lactobacillus rhamnosus GG) Mitigate the Clinical Effects of Antibiotic-Associated Dysbiosis?. Adv Ther. 2024;41:901. 10.1007/s12325-024-02783-3
  9. Liu LH, Han B, Tao J, Zhang K, Wang XK, et al. The effect of Saccharomyces boulardii supplementation on Helicobacter pylori eradication in children: a systematic review and meta-analysis of Randomized controlled trials. BMC Infect Dis. 2023;23:878. 10.1186/s12879-023-08896-4
  10. Sjomina O, Poļaka I, Suhorukova J, Vangravs R, Paršutins S, et al. Randomised clinical trial: efficacy and safety of H. pylori eradication treatment with and without Saccharomyces boulardii supplementation. Eur J Cancer Prev. 2024;33:217. 10.1097/CEJ.0000000000000858
  11. Gopalan S, Ganapathy S, Mitra M, Kumar Joshi D, Veligandla KC, et al. Unique Properties of Yeast Probiotic Saccharomyces boulardii CNCM I-745: A Narrative Review. Cureus. 2023;15:e46314. 10.7759/cureus.46314
  12. Yang Q, Hu Z, Lei Y, Li X, Xu C, et al. Overview of systematic reviews of probiotics in the prevention and treatment of antibiotic-associated diarrhea in children. Front Pharmacol. 2023;14:1153070. 10.3389/fphar.2023.1153070
  13. Salazar-Parra MA, Cruz-Neri RU, Trujillo-Trujillo XA, Dominguez-Mora JJ, Cruz-Neri HI, et al. Effectiveness of Saccharomyces Boulardii CNCM I-745 probiotic in acute inflammatory viral diarrhoea in adults: results from a single-centre randomized trial. BMC Gastroenterol. 2023;23:229. 10.1186/s12876-023-02863-8
  14. Cakcak İE, Aytın YE, Sayın S, Küçükarda A, Gökyer A, et al. An experimental study: the effect of S. boulardii on abemaciclibinduced diarrhea. Turk J Med Sci. 2023;53:51. 10.55730/1300-0144.5557
  15. He XJ, Wang XL, Sun DJ, Huang XY, Liu G, et al. The efficacy and safety of in addition to antofloxacin-based bismuth quadruple therapy for eradication: a single-center, prospective randomized-control study. Therap Adv Gastroenterol. 2023;16:17562848221147763. 10.1177/17562848221147763
  16. Bustos Fernández LM, Man F, Lasa JS. Impact of Saccharomyces boulardii CNCM I-745 on Bacterial Overgrowth and Composition of Intestinal Microbiota in Diarrhea-Predominant Irritable Bowel Syndrome Patients: Results of a Randomized Pilot Study. Dig Dis. 2023;41:798. 10.1159/000528954
  17. Dang X, Choi SY, Choi YJ, Lee JH, Castex M, et al. Probiotic, Paraprobiotic, and Hydrolyzed Yeast Mixture Supplementation Has Comparable Effects to Zinc Oxide in Improving Growth Performance and Ameliorating Post-weaning Diarrhea in Weaned Piglets. Probiotics Antimicrob Proteins. 2024;16:249. 10.1007/s12602-022-10008-8
  18. Duarte ME, Kim SW. Efficacy of Saccharomyces yeast postbiotics on cell turnover, immune responses, and oxidative stress in the jejunal mucosa of young pigs. Sci Rep. 2024;14:19235. 10.1038/s41598-024-70399-2
  19. Zhang H, Nuermaimaiti Y, Hao K, Qi Y, Xu Y, et al. Supplementation with Combined Additive Improved the Production of Dairy Cows and Their Offspring with Maintenance of Antioxidative Stability. Antioxidants (Basel). 2024;13. 10.3390/antiox13060650
  20. Siyal M, Abbas Z, Amir MR, Qadeer MA. Saccharomyces cerevisiae for abdominal pain and discomfort in irritable bowel syndrome patients. Pak J Med Sci. 2024;40:492. 10.12669/pjms.40.3.8349
  21. Middelkoop A, Kettunen H, Guan X, Vuorenmaa J, Tichelaar R, et al. Effect of dietary tall oil fatty acids and hydrolysed yeast in SNP2-positive and SNP2-negative piglets challenged with F4 enterotoxigenic Escherichia coli. Sci Rep. 2024;14:2060. 10.1038/s41598-024-52586-3
  22. Miranda-Yuquilema J, Taboada J, Once V, Coyago M, Briñez W. Effect of Agroindustrial Waste Substrate Fermented with Lactic Acid Bacteria and Yeast on Changes in the Gut Microbiota of Guinea Pigs. Microorganisms. 2024;12. 10.3390/microorganisms12010133
  23. Salah N, Legendre H, Nenov V, Briche M, Serieys F, et al. Does micro-granulated yeast probiotic () supplementation in milk replacer affect health, growth, feed efficiency and economic gain of calves?. Vet Anim Sci. 2024;23:100329. 10.1016/j.vas.2023.100329
  24. Yan H, Xing Q, Xiao X, Yu B, He J, et al. Effect of Saccharomyces cerevisiae Postbiotics and Essential Oil on Growth Performance and Intestinal Health of Weanling Pigs During K88 ETEC Infection. J Anim Sci. 2024;102. 10.1093/jas/skae007
  25. Xu S, Jia X, Liu Y, Pan X, Chang J, et al. Effects of yeast-derived postbiotic supplementation in late gestation and lactation diets on performance, milk quality, and immune function in lactating sows. J Anim Sci. 2023;101. 10.1093/jas/skad201
  26. Santana DAD, Machado MO, de Azevedo BZ, Weber SH, Sotomaior CS, et al. Influence of probiotic supplementation on parasitological parameters in lambs. Vet Parasitol. 2023;318:109934. 10.1016/j.vetpar.2023.109934
  27. Liu J, Ren H, Yuan F, Shao M, Luo H. The effects of on rat colonic hypermotility induced by repeated water avoidance stress and the potential mechanism. PeerJ. 2022;10:e14390. 10.7717/peerj.14390
  28. Conway E, O'Doherty JV, Mukhopadhya A, Dowley A, Vigors S, et al. Maternal and/or direct supplementation with a combination of a casein hydrolysate and yeast β-glucan on post-weaning performance and intestinal health in the pig. PLoS One. 2022;17:e0265051. 10.1371/journal.pone.0265051
image