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Pure S Boulardii

60 Capsules
Insure your #2's
Saccharomyces boulardii helps with diarrhea, especially when eating out or travelling. It is like insurance for your #2s! †

Take 1 capsule to:

Combat diarrhea
Support digestion
Better bowel movements
Fight bad bacteria
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"This supplement is helping my stomach a lot."

Lynn H, Verified Buyer

"It was recommended to me for SIBO and has helped a lot."

TL, Verified Buyer

"Essential Stacks is always a great value for the purity of the product. "

Meghan K, Verified Buyer

"It’s been one of my front-line supplements for keeping candida under control."

G, Verified Buyer

Why You’ll Love
Pure S Boulardii

  1. 1. 5 billion CFUs of Saccharomyces Boulardii probiotics in every capsule
  2. 2. Designed for diarrhea, leaky gut & bowel movements, so you can look & feel your best
  3. 3. Patented proprietary strain of S boulardii (DBVPG 6763)
  4. 4. Stands up to heat, stomach acid & antibiotics
  5. 5. Plus shelf stable formula, so you can take it anywhere
  6. 6. Vegetarian friendly
  7. 7. No allergens - verified gluten, dairy & soy free

Designed For Sensitive Guts

Gluten Free
Gluten Free
Dairy Free
Dairy Free
Soy Free
Soy Free
Hypo Allergenic
3rd Party Verified
3rd Party Verified

Take 1 Capsule, Once a Day

  • Take 1 capsule with or without food
  • If experiencing diarrhea, speak to your healthcare professional about temporarily increasing serving size to 4 capsules daily (20 billion CFUs)
  • Shelf stable formula - does not require refrigeration
Try Pure S Boulardii Risk-Free
We offer a risk-free money-back guarantee with your first order.

How Pure S Boulardii Can Help You

Combats diarrhea

Fight diarrhea-causing bacteria with this probiotic yeast †

Supports digestion

With probiotics that can help with nutrient absorption & gas †

Makes better bowel movements

Enjoy more predictable bowel movements with optimal bacterial balance †

Fights bad bacteria

More good bacteria, means less room for bad bacteria †

Hear What Our Experts Think


Richelle Godwin BS, RDN

Registered Dietician (RDN)

This S Boulardii formulation uses the highly studied DBV PG 6763 strain of Saccharomyces Boulardii, which is well known by its research for supporting gut health.


Dr. Joe Haines MD, MPH

Medical Doctor (MD)

Pure S Boulardii is made with a minimum of 5 billion CFUs of good bacteria per capsule. And most importantly, it is shelf stable, meaning you don't need to keep it hidden away in your fridge.


Bailey Franzen MS, RDN

Registered Dietician (RDN)

Pure S Boulardii meets the highest purity standards across the board. Not only is it independently 3rd party verified gluten, dairy and soy free, but it is also free of GMOs, nuts, fish, shellfish, eggs, starch, yeast, artificial colors and flavors.

Try Pure S Boulardii Risk-Free
We offer a risk-free money-back guarantee with your first order.

Frequently Asked Questions

Product Formula
How To Use
Allergen Free Info
Who It Is For
What does Saccharomyces Boulardii actually do?
S. Boulardii is a probiotic yeast discovered in 1920 by Henri Boulard. Mr Boulard observed in Southeast Asia that people drinking tea made from the skins of lychee fruit didn’t experience as many gastrointestinal issues. This beneficial yeast acts like food for your friendly gut bacteria that may have been hit by diarrhea, antibiotic usage, or a combination of both (hello antibiotic-associated diarrhea). By acting as food, S. Boulardii encourages the repopulation of the gut microbiome with friendly bacteria. It also helps fight off harmful pathogens from attacking the cells of the intestinal lining. What a beautiful little yeast! †
How does S boulardii help?
S. Boulardii is a live beneficial yeast that encourages a healthier environment in the gut microbiome. It binds to pathogens; protects the mucosal barrier; prevents or hinders harmful bacterial toxins from being released; regenerates intestinal cells; supports normal inflammatory reactions; and stimulates the release of digestive enzymes. By doing all this and more, this friendly yeast supports gut health, eases occasional diarrhea and other symptoms associated with a leaky gut. †
What's the difference between Saccharomyces Boulardii and Saccharomyces Cerevisiae?
Our gut-health superhero yeast, S. Boulardii is actually a subspecies of S. Cerevisiae. You've probably heard of S. Cerevisiae's also known as brewer’s yeast and is commonly used in the fermentation process for bread (hello sourdough), as well as beer and wine. So you can think of S. boulardii as a tribe within the nation of S. cerevisiae. And let's be clear here: S. boulardii is superior for gut health to S. cerevisiae, because it can survive the highly-acidic environment of the gut and stays in the body for longer, giving ample time for friendly bacteria in the colon to consume it and create postbiotic short-chain fatty acids that are the key to supporting gut health. Plus, S. boulardii won’t bloat your gut like baker’s yeast may do. Another fun fact: In 2019, researchers discovered that S. boulardii produces acetic acid, which is the main component of vinegar that hinders potentially-harmful microorganisms. S. cerevisiae, meanwhile, is not known to produce acetic acid. †
How do I know if I should take this supplement?
If you have occasional diarrhea caused by a bug you picked up travelling to another country or domestically from food poisoning - or simply trying something new - you may benefit from it. Any occasional gastrointestinal symptom may also be relieved with continued use. Keep in mind S. boulardii does not remain in the gut after supplementation is discontinued. So take it regularly to prevent symptoms from developing or while symptoms are present. You may also take this probiotic yeast everyday to support a healthy gut microbiome for overall wellness. †
When should I take Pure S Boulardii?
S Boulardii is flexible. Meaning you can take it anytime. Take it with meals or without. But if you take it with Smart Probiotic and you don’t want to have to remember when to take two different probiotics, take both of them ideally 30 minutes before a meal or at the start of a meal.
How should I take it?
Your choice: swallow the capsule with water or open the capsule and mix in food! (Unlike some other probiotic products, it is okay to take S Boulardii out of the capsule, as the hardy strain can survive the acidic journey through your stomach)
How much should I take?
Take one capsule 1-2 times daily. Studies suggest that a dose of 5-10 billion colony forming units (CFUs) are helpful for a variety of issues. Each capsule supplies 5 billion CFUs. With all of that said, if you're experiencing diarrhea, you can up your dose to 4 capsules a day while your fighting the porcelain throne!
How many servings / days supply?
Each bottle supplies 60 capsules. One capsule a day provides a two-month supply. Easy peasy math.
How should I store this?
No refrigeration is necessary. For best results, store in your pantry and keep it company right next to your other Essential Stacks digestive health supplements.
How long till I feel a noticeable difference?
Many supplements can take a long time to notice the effects. But that wouldn’t do you any good if you have diarrhea. The good news is that research supports this probiotic yeast and that it can offer quick benefits for occasional diarrhea and other digestive concerns. But there is no conclusive data that says exactly how quickly it will work. Feel the difference for yourself and if you experience no benefits, we will refund your money within 60 days of your purchase.
Does it contain gluten, dairy or soy?
No. Plus, it is 3rd party verified gluten, dairy and soy free.
Can I take Pure S Boulardii with other Essential Stacks products?
Yes, it especially pairs well with our prebiotic supplement, Friendly Prebiotics, as well as our broad spectrum probiotic blend, Smart Probiotic.
Can children take Pure S Boulardii?
We like to err on the safe side when it comes to children. So please consult with your child’s healthcare provider to determine if S Boulardii is okay for them and what the appropriate dose would be.
Can pregnant or nursing mothers take Pure S Boulardii?
We recommend you consult your physician before using this or any dietary supplement.
Are any medical issues contraindicated?
If you have any medical issues, please consult your physician before using this or any dietary supplement.
Can I take it with my medications?
If you are taking any medications, please consult your physician before using this or any dietary supplement. In particular, if you’re taking an anti-fungal medication, keep in mind that it may reduce the effectiveness of this S Boulardii probiotic (since S Boulardii is a yeast, which is a type of fungus). If this is the case you can try taking the medication and probiotic at different times of the day just like an antibiotic and probiotic.

See Why People Love
Pure S Boulardii

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Lynn H.
United States

Pure S. Boulardii

this supplement is helping my stomach a lot..

Try Pure S Boulardii Risk-Free
We offer a risk-free money-back guarantee with your first order.