Saccharomyces Boulardii

Saccharomyces Boulardii Supplements Australia

Saccharomyces boulardii is a probiotic yeast, not a bacterium – a distinction that matters because it is naturally resistant to antibiotics and survives the acidic environment of the stomach without needing enteric coating or refrigeration. It moves through the gut transiently, exerting its effects while present, and clears after supplementation ends.

People commonly reach for S. boulardii after a course of antibiotics, when digestive patterns have been disrupted by travel or illness, or as part of a practitioner-directed gut restoration protocol. Unlike bacterial probiotics, it can be taken alongside antibiotic therapy without being inactivated by the antibiotic itself.

Key principle: The most important variable when comparing S. boulardii products is whether the formula delivers it as a standalone ingredient – for targeted, dose-controlled use – or combined with other probiotics, enzymes, or actives that broaden the scope of support.

Saccharomyces Boulardii products at Fairfield Nutrition

Product Brand Best For Key Ingredients / Notes
Seeking Health Saccharomyces Boulardii (60 CAPS) Seeking Health Targeted standalone S. boulardii use S. boulardii as sole active; capsule format
myBrainCo Gut Repair – 300g Powder MyBrainCo Multi-ingredient gut support with S. boulardii S. boulardii with probiotics, prebiotics, resistant starch, and digestive enzymes; powder format
Microbiome Labs RestorFlora, 60 capsules Microbiome Labs S. boulardii paired with bacterial probiotic strains S. boulardii in a multi-strain probiotic formula; capsule format
Microbiome Labs Epic Defence 30 Capsules Microbiome Labs Gut-immune formula with zinc Immunobiotics and bioavailable zinc combined with S. boulardii; capsule format
Microbiome Labs Digest Mate, 120 caps Microbiome Labs Digestive enzyme and probiotic combination S. boulardii with digestive enzymes and probiotic strains; 120-cap supply
Cellcore CT-Biotic (60 capsules) Cellcore Multi-strain probiotic with BioActive Carbon 11 probiotic strains including S. boulardii; BioActive Carbon blend; capsule format
Bioceuticals SB Floractiv 500 (30 caps) Bioceuticals High-dose standalone S. boulardii 500mg S. boulardii per capsule; practitioner-brand formula
Metagenics Gut Ultraflora Spectrum (60 caps) Metagenics Broad-spectrum multi-strain probiotic Multi-strain bacterial probiotics with S. boulardii; spectrum formula
Yomogi Saccharomyces cerevisiae (boulardii) Probiotic Yomogi Pharmaceutical-grade single-strain S. boulardii HANSEN CBS 5926 pharmaceutical strain; heat-stable formulation
Bioclinic Naturals IBS Relief – 90 caps Bioclinic Naturals Small intestinal and bowel support formula Scobiotic blend including S. boulardii; formulated for small intestinal support; 90-cap supply

How to choose between Saccharomyces Boulardii products

The main question is whether you need S. boulardii as the sole active ingredient – for targeted, dose-controlled use – or as part of a formula that also addresses other aspects of digestive function.

  • Standalone S. boulardii: Seeking Health, Bioceuticals SB Floractiv 500, and Yomogi each deliver S. boulardii as the primary or sole active. Bioceuticals provides 500mg per capsule for a higher per-dose amount; Yomogi uses the HANSEN CBS 5926 pharmaceutical strain in a heat-stable format; Seeking Health offers a straightforward capsule at a standard clinical dose.
  • S. boulardii with other probiotic strains: RestorFlora, Metagenics Gut Ultraflora Spectrum, and CT-Biotic each combine S. boulardii with bacterial probiotic strains for broader microbiome coverage. CT-Biotic also includes a BioActive Carbon blend, which suits protocols where that component is part of the approach.
  • Multi-ingredient gut formulas: myBrainCo Gut Repair, Digest Mate, Epic Defence, and Bioclinic Naturals IBS Relief include S. boulardii alongside other actives – such as prebiotics, resistant starch, digestive enzymes, zinc, or targeted botanical compounds. These suit situations where gut support is needed across multiple mechanisms, not probiotic supplementation alone.

If your practitioner has recommended S. boulardii specifically, a standalone formula gives you cleaner dose control; if you are supporting digestive health more broadly, a multi-ingredient formula is likely the better fit.


All Saccharomyces Boulardii products stocked at Fairfield Nutrition are shown below.

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