Overview

SCIENTIFIC SCORE
Moderately Effective
Based on 7 Researches
8.4
USERS' SCORE
Excellent
Based on 9 Reviews
9.1
Supplement Facts
Serving Size: 2 Veg Capsules
Amount Per Serving
%DV
Saccharomyces boulardii (10 Billion CFU)(Saccharomyces cerevisiae var. boulardii I-3799)
1,000 mg
**

Top Medical Research Studies

9
Saccharomyces boulardii helps atopic dermatitis
We examined how Saccharomyces boulardii might help with atopic dermatitis (AD), a challenging allergic condition. In a study with mice, S. boulardii was given either before or during the induction of AD-like symptoms.

This probiotic treatment showed promising results, reducing inflammation, improving skin and colon health, and lowering certain harmful blood markers. The study highlighted how S. boulardii can modulate inflammatory responses, suggesting it might be a useful support therapy for managing AD symptoms.
Read More
We explored how perinatal administration of Saccharomyces cerevisiae UFMG A-905 could help prevent asthma in mouse offspring. This study involved various groups of mice receiving the yeast at different stages: before conception, during pregnancy, or only during lactation.

Our results showed that those exposed to S. cerevisiae exhibited significantly less airway hyperresponsiveness and lower levels of certain inflammatory markers compared to those that didn’t receive the treatment. Notably, the greatest protection occurred when the yeast was given during lactation.

Overall, it seems that S. cerevisiae UFMG A-905 shows promise in the management of asthma, especially when administered early in the offspring's development.
Read More
8
Probiotic aids allergic asthma management
We explored the effects of Saccharomyces boulardii on allergic asthma in a mouse model. The study revealed that S. boulardii improved inflammation and lung damage, while also restoring gut microbiota and metabolic balance.

By analyzing gut microbiota and metabolites, we found that S. boulardii up-regulated METTL3, playing a key role in alleviating symptoms. This suggests that probiotics like S. boulardii could offer new strategies to tackle allergic asthma through healthier gut dynamics.
Read More

Most Useful Reviews

10
Addressed multiple health issues
634 people found this helpful
Healed my food allergies, IBS, autoimmune disease, arthritis, and more. I endured glyphosate poisoning from consuming GMO and non-organic foods, leading to severe food allergies and numerous health issues. After reading about a probiotic yeast's effects, I combined it with various supplements, and within two weeks, my conditions significantly improved. I am now symptom-free, thanks to this powerful probiotic yeast and additional supportive supplements. Organic eating and avoiding glyphosate-poisoned foods are essential for maintaining my health.
Read More
9
Effective for allergies
2 people found this helpful
At the start of treating my child's allergies, I administered a 1/3 adult dose for 10 weeks. The results were quick—flatulence stopped, stool improved, and foul odour disappeared. We also incorporated various dietary supplements to enhance treatment.
Read More
9
Allergy improvement
1 people found this helpful
Now Foods' Saccharomyces was part of an intestinal cleansing regimen as prescribed by my doctor. Despite initial scepticism, I was pleasantly surprised by the results after taking 2 capsules daily for 10 days. My skin is clearer, my stomach is calmer, and my allergies have improved.
Read More

Medical Researches

SCIENTIFIC SCORE
Moderately Effective
Based on 7 Researches
8.4
  • All Researches
9
Saccharomyces boulardii helps atopic dermatitis
We examined how Saccharomyces boulardii might help with atopic dermatitis (AD), a challenging allergic condition. In a study with mice, S. boulardii was given either before or during the induction of AD-like symptoms.

This probiotic treatment showed promising results, reducing inflammation, improving skin and colon health, and lowering certain harmful blood markers. The study highlighted how S. boulardii can modulate inflammatory responses, suggesting it might be a useful support therapy for managing AD symptoms.
Read More
9
Saccharomyces boulardii enhances allergy treatment
We explored the impact of combining Saccharomyces boulardii with cetirizine hydrochloride in treating allergic rhinitis in children. In a study involving 90 children, we divided them into two groups: one received only cetirizine, while the other was given both medications.

After four weeks, results showed that the group using Saccharomyces boulardii experienced a significantly higher rate of symptom improvement and better changes in immune markers compared to the control group. The combined treatment had an impressive 91.11% effectiveness rate compared to 68.89% for cetirizine alone, suggesting that this probiotic may enhance allergy management for children.
Read More
We explored how perinatal administration of Saccharomyces cerevisiae UFMG A-905 could help prevent asthma in mouse offspring. This study involved various groups of mice receiving the yeast at different stages: before conception, during pregnancy, or only during lactation.

Our results showed that those exposed to S. cerevisiae exhibited significantly less airway hyperresponsiveness and lower levels of certain inflammatory markers compared to those that didn’t receive the treatment. Notably, the greatest protection occurred when the yeast was given during lactation.

Overall, it seems that S. cerevisiae UFMG A-905 shows promise in the management of asthma, especially when administered early in the offspring's development.
Read More
8
Probiotic aids allergic asthma management
We explored the effects of Saccharomyces boulardii on allergic asthma in a mouse model. The study revealed that S. boulardii improved inflammation and lung damage, while also restoring gut microbiota and metabolic balance.

By analyzing gut microbiota and metabolites, we found that S. boulardii up-regulated METTL3, playing a key role in alleviating symptoms. This suggests that probiotics like S. boulardii could offer new strategies to tackle allergic asthma through healthier gut dynamics.
Read More
8
Saccharomyces boulardii shows partial benefits
We explored how a symbiotic preparation with S. boulardii lysate affects gut permeability linked to allergies. In our study with Sprague Dawley rats, stress led to increased gut permeability and significant changes in intestinal structure. However, this stress-induced damage was partly counteracted by the KC-1317 preparation. Although the treatment helped maintain some intestinal health markers, it did not fully restore the altered gut hormone levels caused by stress. Overall, while some benefits were observed, the impact of S. boulardii on allergy-related gut issues remains limited.
Read More

User Reviews

USERS' SCORE
Excellent
Based on 9 Reviews
9.1
  • All Reviews
  • Positive Reviews
  • Negative Reviews
10
Addressed multiple health issues
634 people found this helpful
Healed my food allergies, IBS, autoimmune disease, arthritis, and more. I endured glyphosate poisoning from consuming GMO and non-organic foods, leading to severe food allergies and numerous health issues. After reading about a probiotic yeast's effects, I combined it with various supplements, and within two weeks, my conditions significantly improved. I am now symptom-free, thanks to this powerful probiotic yeast and additional supportive supplements. Organic eating and avoiding glyphosate-poisoned foods are essential for maintaining my health.
Read More
9
Effective for allergies
2 people found this helpful
At the start of treating my child's allergies, I administered a 1/3 adult dose for 10 weeks. The results were quick—flatulence stopped, stool improved, and foul odour disappeared. We also incorporated various dietary supplements to enhance treatment.
Read More
9
Allergy improvement
1 people found this helpful
Now Foods' Saccharomyces was part of an intestinal cleansing regimen as prescribed by my doctor. Despite initial scepticism, I was pleasantly surprised by the results after taking 2 capsules daily for 10 days. My skin is clearer, my stomach is calmer, and my allergies have improved.
Read More
9
No allergy reactions
Excellent product! I experienced no allergic reactions to its ingredients, and I noticed visible results within a day.
Read More
9
Treats all symptoms
Absolutely adore this product! It should be in every home! It effectively resolves diarrhoea, constipation, abdominal pain, allergies, and heartburn.
Read More

Frequently Asked Questions

9
No allergy reactions
Excellent product! I experienced no allergic reactions to its ingredients, and I noticed visible results within a day.
9
Allergy improvement
1 people found this helpful
Now Foods' Saccharomyces was part of an intestinal cleansing regimen as prescribed by my doctor. Despite initial scepticism, I was pleasantly surprised by the results after taking 2 capsules daily for 10 days. My skin is clearer, my stomach is calmer, and my allergies have improved.
7.5
Slight relief noted
3 people found this helpful
I suspected leaky gut, and after taking this, my allergy-related symptoms were slightly alleviated. I've used several supplements, so I'm uncertain about its overall effectiveness, but it appears beneficial.
0
No relief experienced
I had high expectations for NOW Foods’ Saccharomyces Boulardii supplement, given the brand's reputation and its known benefits for gut health. As a person with a sensitive stomach, allergies, and IBS, I'm always in search of effective supplements. However, after a month, I found it disappointing as it seemed to exacerbate my constipation rather than relieve my stomach issues. Although I have faith in NOW Foods and the probiotic's potential, this product did not meet my needs, earning a 3-star rating.
9
Effective for allergies
2 people found this helpful
At the start of treating my child's allergies, I administered a 1/3 adult dose for 10 weeks. The results were quick—flatulence stopped, stool improved, and foul odour disappeared. We also incorporated various dietary supplements to enhance treatment.
7.5
Effective for allergies
Saccharomyces Boulardii is a staple in my first aid kit for bloating, diarrhoea, and neurodermatitis. These small capsules containing a cream-coloured powder are a unique probiotic aiming to normalise the gastrointestinal tract. They stand out by being resistant to the stomach's acidic environment. I’ve noticed that with regular intake, my food allergies and stress-related allergies have become asymptomatic for extended periods. This probiotic has repeatedly helped me retain beneficial bacteria during antibiotic courses, which usually devastate my intestines. Thanks to Saccharomyces Boulardii, I've managed to safeguard my gut on two occasions in a year.
9
Saccharomyces boulardii enhances allergy treatment
We explored the impact of combining Saccharomyces boulardii with cetirizine hydrochloride in treating allergic rhinitis in children. In a study involving 90 children, we divided them into two groups: one received only cetirizine, while the other was given both medications.

After four weeks, results showed that the group using Saccharomyces boulardii experienced a significantly higher rate of symptom improvement and better changes in immune markers compared to the control group. The combined treatment had an impressive 91.11% effectiveness rate compared to 68.89% for cetirizine alone, suggesting that this probiotic may enhance allergy management for children.
8
Probiotic aids allergic asthma management
We explored the effects of Saccharomyces boulardii on allergic asthma in a mouse model. The study revealed that S. boulardii improved inflammation and lung damage, while also restoring gut microbiota and metabolic balance.

By analyzing gut microbiota and metabolites, we found that S. boulardii up-regulated METTL3, playing a key role in alleviating symptoms. This suggests that probiotics like S. boulardii could offer new strategies to tackle allergic asthma through healthier gut dynamics.
9
Saccharomyces boulardii helps atopic dermatitis
We examined how Saccharomyces boulardii might help with atopic dermatitis (AD), a challenging allergic condition. In a study with mice, S. boulardii was given either before or during the induction of AD-like symptoms.

This probiotic treatment showed promising results, reducing inflammation, improving skin and colon health, and lowering certain harmful blood markers. The study highlighted how S. boulardii can modulate inflammatory responses, suggesting it might be a useful support therapy for managing AD symptoms.
8
Saccharomyces boulardii shows partial benefits
We explored how a symbiotic preparation with S. boulardii lysate affects gut permeability linked to allergies. In our study with Sprague Dawley rats, stress led to increased gut permeability and significant changes in intestinal structure. However, this stress-induced damage was partly counteracted by the KC-1317 preparation. Although the treatment helped maintain some intestinal health markers, it did not fully restore the altered gut hormone levels caused by stress. Overall, while some benefits were observed, the impact of S. boulardii on allergy-related gut issues remains limited.

References

  1. Buttar PA, Mazhar MU, Khan JZ, Jamil M, Abid M, et al. Saccharomyces boulardii (CNCM I-745) ameliorates Ovalbumin-induced atopic dermatitis by modulating the NF-κB signaling in skin and colon. Arch Dermatol Res. 2025;317:500. 10.1007/s00403-025-04057-6
  2. Liu D, Hu L, Yang Y, Wang Y, Li Y, et al. Saccharomyces boulardii alleviates allergic asthma by restoring gut microbiota and metabolic homeostasis via up-regulation of METTL3 in an m6A-dependent manner. Immunol Lett. 2024;267:106853. 10.1016/j.imlet.2024.106853
  3. Fang GX, Li Z, Su C, Hu GH. [Clinical observation of saccharomyces boulardii combined with cetirizine hydrochloride in children allergic rhinitis]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2017;31:1649. 10.13201/j.issn.1001-1781.2017.21.007
  4. Takadanohara H, Catanzaro R, Chui de H, He F, Yadav H, et al. Beneficial effect of a symbiotic preparation with S. boulardii lysate in mild stress-induced gut hyper-permeability. Acta Biomed. 2012;83:208.
  5. Sandy CM, Guimarães CC, Fonseca VMB, Nicoli JR, Martins FS, et al. Perinatal administration of Saccharomyces cerevisiae UFMG A-905 prevents asthma development in the offspring of mice. Benef Microbes. 2024;16:125. 10.1163/18762891-bja00044
  6. Singh RG, Garcia-Campayo V, Green JB, Paton N, Saunders JD, et al. Efficacy of a yeast postbiotic on cold/flu symptoms in healthy children: A randomized-controlled trial. Pediatr Res. 2024;96:1739. 10.1038/s41390-024-03331-z
  7. Calazans APCT, Milani TMS, Prata AS, Clerici MTPS, Nicoli JR, et al. A Functional Bread Fermented with UFMG A-905 Prevents Allergic Asthma in Mice. Curr Dev Nutr. 2024;8:102142. 10.1016/j.cdnut.2024.102142
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