Product Description
Travel, racing, and heavy training blocks all have one thing in common: they disrupt your gut. New food environments, stress hormones, back-to-back long efforts, and antibiotic use can all throw your digestive system into chaos at exactly the wrong moment.
Optibac Saccharomyces Boulardii gives you a proven, fast-acting tool to keep your gut stable, whether you're preparing for a destination race, recovering from a GI episode, or managing the digestive demands of high training load.
Saccharomyces boulardii is a naturally occurring friendly yeast — not a bacteria — that has been researched in thousands of adults and children across clinical trials spanning over 50 years. That distinction matters: because it's a yeast, it's naturally more resistant to heat, humidity, and stomach acid than standard bacterial probiotics. It reaches the gut alive, restores healthy intestinal balance quickly, and doesn't cause the constipation associated with common anti-diarrheal medications.
Clinically Trialled for Digestive Resilience – S. boulardii has been internationally acclaimed for its effectiveness against occasional diarrhea — including traveler's diarrhea and antibiotic-associated disruption. It works by restoring healthy gut flora balance and maintaining the integrity of the intestinal environment, so your system can get back to normal fast.
More Robust Than Bacterial Probiotics – Because S. boulardii is a yeast rather than a bacteria, it shows exceptional resistance to environmental stressors. No refrigeration needed. No sensitivity to stomach acidity. Each capsule guarantees 5 billion live cultures surviving intact to where they need to go.
Fast-Acting and Safe for Ongoing Use – Optibac S. Boulardii can be taken acutely during a GI episode or continuously as a daily gut resilience strategy. It causes no dependency and is safe for long-term use — making it practical as both a travel essential and a year-round gut health foundation.
Each capsule contains 275mg of pure Saccharomyces boulardii, delivering 5 billion CFU. No fillers, no added sugars, no artificial colors or flavors. Vegan-friendly and free from dairy, gluten, and soy. The shelf-stable format goes in a carry-on, drop bag, or race kit without a second thought.
For endurance athletes, gut health isn't a nice-to-have — it's a performance variable. When your gut is off, nutrition absorption suffers, energy tanks, and race day plans fall apart. Optibac S. Boulardii is the targeted, portable gut support that keeps you running on schedule.
How to Use Optibac Probiotics Saccharomyces Boulardii
Daily Maintenance: Take 1 capsule daily with or without food to support ongoing gut resilience and healthy intestinal balance.
Travel or Increased Need: Increase to up to 4 capsules daily during travel, periods of antibiotic use, or active digestive disruption. Begin 2–5 days before travel for best preventive effect.
Pro Tip: Unlike bacterial probiotics, S. boulardii doesn't compete with your regular probiotic strains — it can be taken alongside other probiotics. Pair it with a bacterial probiotic for comprehensive gut coverage before high-stakes race travel.
- Gluten free
- Vegan
Supplement Facts
60 Servings
Serving Size: 1 Capsule
Serving Per Container: 40
| Amount Per Serving | ||
|---|---|---|
| % Daily Value* | ||
| Probiotic cultures 275mg | ** | |
| Saccharomyces boulardii | ** | |
| Total probiotic cultures 5billion CFU± | ** | |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Daily Value (DV) not established
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We do not accept returns on food items that have been opened, but we will issue a store credit if you are unsatisfied. In the event of a return, you must first contact us before sending back a return shipment.
Consumable products over $40 receive a 50% store credit. This includes specialty nutrition products such as ketones or supplements/vitamins.
Optibac Probiotics Saccharomyces Boulardii FAQ's
Everything you need to know about Optibac Probiotics Saccharomyces Boulardii.
Take 1 to 4 capsules daily depending on what you're using it for — 1 to 2 capsules for general gut maintenance or ongoing support, 3 to 4 for active gut disruption like travel, antibiotics, or GI illness, and up to 6 capsules daily in more intensive situations. It can be taken with or without food and doesn't need refrigeration, making it easy to take anywhere.
Yes — and this is one of the most compelling reasons to keep it in your kit. Because S. boulardii is a yeast rather than a bacterium, antibiotics can't touch it. It keeps working the whole time your antibiotic course is wiping out your gut bacteria. Optibac recommends spacing it 2 hours before or after your antibiotic dose.
S. boulardii is a beneficial yeast — not a bacterium — which is what makes it unique. It's been used safely around the world for over 50 years, researched in thousands of adults and children, and is specifically clinically trialled for occasional diarrhea. Because it's a yeast, it survives antibiotics, stomach acid, and hot humid environments that would kill most bacterial probiotic strains.
Optibac describes it as fast-acting, and most people notice results quickly — often within 24 to 48 hours when used for acute gut disruption like traveler's diarrhea or antibiotic-associated gut distress. For ongoing gut health support, consistent daily use is what builds lasting benefit.
No — and that's actually a feature, not a limitation. S. boulardii works transiently while you take it and clears your system naturally within a few days of stopping. There's no overgrowth risk, no dependency, and it works harmoniously alongside your existing gut bacteria and other probiotic supplements without competing with them.