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Tough on gut stress, gentle on your dog—Saccharomyces Boulardii is a resilient probiotic yeast that thrives even in the presence of gut-harming drugs and chemicals. Ideal for dogs on long or short-term antibiotics.

Recommended dose

standardLabel verified

Directions FAQs Reviews Saccharomyces boulardii 109 Reviews Saccharomyces boulardii is the probiotic yeast that's much more resistant to gut-stressing drugs and chemicals than traditional probiotics. Helps maintain a healthy gut during antibiotic use Supports a healthy gut lining No fillers or dextrins Save 15% with AutoShip $25.49 $29.99 Choose your dog size Large Dog (61-100 lbs) Every 30 days One Time Purchase $29.99 1 Add to Cart $ 29.99 Saccharomyces boulardii is the probiotic yeast that's much more resistant to gut-stressing drugs and chemicals than traditional probiotics. Helps maintain a healthy gut during antibiotic use Supports a healthy gut lining No fillers or dextrins Huge Difference "After trying several probiotics, S. Boulardii has made a huge difference for my dog! He hasn’t had a bout of loose stools since we started giving him S. Boulardii. The improvement started immediately." Anne G. The Future of Probiotics Saccharomyces boulardii is an exciting probiotic yeast that's not harmed by the drugs and chemicals that can damage bacteria-based probiotics. This makes Saccharomyces boulardii the perfect choice for dogs exposed to drugs and chemicals. Helps maintain a healthy gut lining: Studies show S. boulardii can influence parts of the immune system that maintain proper gut permeability. Low glycemic load: While most probiotics are carried in maltodextrin, which is high glycemic and can spike insulin, S. boulardii is free of dextrins and other harmful fillers. Third party tested: For quality and purity. Premium Ingredients Saccharomyces boulardii Organic inulin from Jerusalem artichoke Ingredients Saccharomyces boulardii Saccharomyces boulardii Saccharomyces boulardii is a healthy, probiotic yeast. Yeast-based probiotics are unique because they're not harmed by the drugs and chemicals that can damage other probiotics and bacteria. This makes Saccharomyces boulardii the perfect choice for dogs exposed to drugs and chemicals. This friendly yeast delivers other gut benefits too. It helps maintain a healthy gut lining and studies show S. boulardii can influence parts of the immune system that maintain proper gut permeability. Organic inulin from Jerusalem artichoke Organic inulin from Jerusalem artichoke Inulin is a type of soluble fiber that acts as a prebiotic that to help grow beneficial gut bacteria, thereby supporting overall digestive health. FOS may contribute to better glycemic control by balancing blood sugar levels. Directions

Four Leaf Rover

Saccharomyces boulardii

87
out of 100
Submit correction or new panel
Probiotics

Four Leaf Rover discloses the full ingredient panel for Saccharomyces boulardii and lists net contents (1.8 oz (49.5 g)), which makes it easy to verify what you are feeding. Ingredient names below come straight from the manufacturer label.

VHP: NOT_FOUND
Powder
Full active disclosure
Category
Probiotics
Brand
Four Leaf Rover
Format
Powder
Package size
1.8 oz (49.5 g)
Servings
Not published
Country
Canada
Manufactured in Canada
Formula reviewed: 2026-08-19 · scoring model supplement-wise-v3.2 · formula v1
Supplement Wise Score
87out of 100
HIGHLY RATED

A strongly formulated and documented supplement with only limited gaps.

100%
Confidence
High

Confidence is calculated separately from the product score, from how complete our source record is.

Where to Buy

Why it scored what it scored

One ingredient-first score out of 100, always the exact sum of six categories: scientific value of the ingredients 40, formula and effective dosing 25, ingredient quality and safety 15, manufacturing quality 10, usage and practicality 5, and country of origin 5. Where our research record is still open we say so and lower confidence — we never treat a gap in our own research as evidence against a product, and reviews never affect the score.

Total 87 / 100 — the exact sum of the categories above. Confidence in the underlying data: High (100%).

Safety notes

No published safety review is on file for this supplement. That is an absence of information, not evidence that the product is safe. Always check with your veterinarian before adding a supplement, especially alongside medication.

Why we like it
  • Full ingredient panel published by the manufacturer
  • Weight-based daily feeding chart provided
  • Available in Canada
What to know
  • Amounts per active are not always disclosed on the label
  • Talk to your vet before adding any supplement, especially alongside medication

Where to Buy

Canadian retailers on record. Stock and price vary by store and province.

    Ingredient panel

    Actives and their disclosed amounts, exactly as published on the label. Undisclosed amounts earn no scoring credit.

    IngredientAmountTypeEvidence
    Saccharomyces boulardii100% of formulaActiveB
    Organic inulin from organic Jerusalem artichokeNot disclosedInactiveUNKNOWN

    Certifications

    No third-party certification is confirmed for this product yet. We only list programs we can verify from the brand or the certifying body.

    Regulatory

    VHP status
    NOT_FOUND
    Country of manufacture
    Canada
    Canadian availability
    WIDELY_AVAILABLE
    UPC
    Not published

    Canadian pricing (CAD)

    Community reviews do not affect the Supplement Wise score.

    Owner reviews

    Real experiences from Paw Privileges members. Reviews never affect the Wise score — scoring is based only on label evidence.

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    Educational information only. Not veterinary advice, diagnosis, treatment, or a substitute for consulting your veterinarian. Sponsors never influence Supplement Wise scores.