"This was the first time someone showed me what was happening and what to do about it. "
Practitioner grade
Practitioner only
E. coli Nissle 1917 probiotic
A 120 year old probiotic with unmatched clinical evidence
Mutaflor provides E. coli Nissle 1917, the most clinically documented E. coli probiotic strain, with over a century of evidence for ulcerative colitis maintenance, irritable bowel syndrome and gut microbiome restoration.
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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.
Capsule (cold chain)
Escherichia coli Nissle 1917
The most clinically documented E. coli probiotic strain, with over 100 years of research. Approved therapy for ulcerative colitis in parts of Europe. Requires refrigeration.
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.
As directed by your practitioner. Always refrigerate.
Dietary supplements should not replace a balanced diet. If using for inflammatory bowel disease, use under medical supervision, do not discontinue prescribed medication without your gastroenterologist's advice.
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.
Begin your investigation
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.