"This was the first time someone showed me what was happening and what to do about it. "
Practitioner grade
Practitioner only
Saccharomyces boulardii (SB-500)
The clinically studied yeast probiotic for travel and gut resilience
Provides Saccharomyces boulardii, a probiotic yeast (not bacteria) unaffected by antibiotics, for antibiotic-associated diarrhoea prevention, C. difficile support and traveller's diarrhoea protection.
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Practitioner consult session
A 15-minute consultation. An email link will be included in your order confirmation to make the booking.
Optional 1:1 with our clinical team · $49
TGA-listed AUST L
Practitioner-grade formula
Clinician-reviewed before dispatch
Ships in 2 business days
What's in it
Each ingredient is in its most bioavailable form, at a clinically meaningful dose. No fillers, no token amounts, no marketing-led blends.
Powder blend
Saccharomyces boulardii
Probiotic yeast for microbial balance.
Included
Always read the label and follow directions for use. Vitamins and minerals can only be of assistance if dietary intake is inadequate. If symptoms persist, consult a healthcare professional.
How to take it
Simple to take, with a few timing notes that make a real difference to absorption.
1-2 capsules daily with or without food. Can be taken simultaneously with antibiotics.
Dietary supplements should not replace a balanced diet. In immunocompromised patients, any live organism supplementation should be discussed with a doctor. Very rare cases of Saccharomyces fungaemia have been reported in severely immunocompromised hospitalised patients.
Real people. Real impact.
Patients following practitioner-designed protocols, sharing their outcomes in their own words.
"My ferritin had been low-normal for three years. The protocol made a real difference within six weeks."
"Someone finally put all the pieces together. Clear, specific and actually useful."
Trustpilot · 4.8/5 from 892 reviewsGoogle · 4.9/5 from 412 reviewsPractitioner referral · 97% would recommend
Part of the Gut Health hub. Explore all protocols, supplements and investigations.
Back to Gut Health →Frequently asked.
Common questions about how OptiLabs works: testing, supplements, clinician review, returns and timing.
Are the supplements safe?
All carry an AUST L designation from the TGA. Every order is reviewed by a clinician before dispatch.
Do I need a referral?
No. All tests are available to order directly. Our lab partner is NATA and RCPA accredited, operating as a direct-access pathology service.
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Personalised health. Clinical rigour. Delivered to you.
A proper investigation into what's driving your symptoms, with a protocol built around your results, not a generic recommendation.