4LR Saccharomyces boulardii - Yeast Based Probiotics For Dogs

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Saccharomyces boulardii is a probiotic yeast that supports a healthy gut flora and lining. Because it's a yeast and not bacteria, S. boulardii is much more resistant to gut-stressing drugs and chemicals. 

READ: Probiotics & Prebiotics: Why They Are Essential for your Dog's Health


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 with guts stressed by gut-harming 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.


Most probiotics are in a maltodextrin carrier, which is the highest known glycemic ingredient. All of our probiotics are made in small batches without any high glycemic ingredients.

Each batch is third-party tested for quality and purity and carries a 30-day money-back guarantee.


Active Ingredients per 1/2 tsp (1.6 g):

Saccharomyces boulardii .............................................  10 Billion CFU
Organic Inulin from Jerusalem 
artichoke ...................... 1056 mg

Inactive Ingredients: None (No maltodextrin, no fillers, no artificial ingredients)


Recommended to maintain a healthy intestinal tract and proper gut flora.

Give Saccharomyces boulardii orally daily, or as directed by your veterinarian. 

Refrigerate after opening. 

Body Weight Amount Per Day Daily Cost & Supply
1-25 lbs 1/8 tsp daily

 $0.32/day (120 day supply)

26-50 lbs

1/4 tsp daily

$0.65/day (60 day supply)

51-75 lbs 1/2 tsp daily

$1.31/day (30 day supply)

76 - 100 lbs 3/4 tsp daily

$1.79/day (22 day supply)

100 + lbs 1 tsp daily

$2.63/day (15 day supply)

Net Contents: 1.65oz (46.7 g)


Can Saccharomyces boulardii cause yeast infections?

Since S. boulardii is a probiotic yeast, people mistakenly assume it can cause or worsen yeast infections. This isn't true ... S. boulardii supports the gut flora.

Can I give Saccharomyces boulardii if my dog is on antibiotics?

Research shows S. boulardii can help manage or prevent antibiotic associated diarrhea.

Is Saccharomyces boulardii a natural part of my dog's gut flora?

Yes! S. boulardii is a normal part of the intestinal flora. One studyshowed that S. boulardii levels are higher in patients with unbalanced gut flora due to antibiotic use.

How quickly does Saccharomyces boulardii work?

Studies show that S. boulardii can populate within half an hour when given orally and steady state concentrations are achieved within 3 days. S. boulardii also stays in the gut for 3-5 days, which is much longer than many probiotics.

Container holds 30 large dog servings

Regular delivery rates apply for all orders within our delivery zones. 

For orders Canada wide, please contact info@granddog.ca for a shipping quote.

Check delivery zone here. 

4LR Saccharomyces boulardii - Yeast...

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