If you’ve been struggling with ongoing bloating, food reactions, constipation, loose stools, or unexplained fatigue - SIBO (Small Intestinal Bacterial Overgrowth) is one of the most common causes. But unless it’s properly diagnosed, most treatments won’t work.
This is where SIBO breath testing comes in.
It’s the most reliable way we have to detect whether gas-producing bacteria have overgrown in the small intestine - and whether the overgrowth is primarily hydrogen, methane, or hydrogen sulfide.
Each of these types requires a slightly different treatment approach. Without this clarity, it’s easy to go in circles.
Why testing matters
Bloating, reflux, constipation, diarrhoea, food sensitivities - these symptoms are common in SIBO, but they’re not exclusive to it. Parasites, Candida, H. pylori, LIBO, and even nervous system issues can cause a similar picture. That’s why testing is so important.
A proper SIBO breath test helps us:
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Confirm whether SIBO is actually present
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Identify the type of gas (hydrogen, methane, or hydrogen sulfide)
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Pinpoint whether the overgrowth is in the small or large intestine
That information allows us to tailor your treatment, rather than relying on guesswork - which can save you months (or years) of frustration, unnecessary diets, and trial-and-error protocols.
The test we recommend
We generally recommend a 3-hour lactulose breath test. Lactulose is a non-absorbable sugar that travels the entire length of the small intestine, feeding any bacteria along the way and triggering gas production (hydrogen and/or methane) if overgrowth is present.
This gives us the clearest picture of what’s happening not just in the upper part of the gut, but throughout - which is especially important when we’re trying to distinguish between SIBO and LIBO (Large Intestinal Bacterial Overgrowth).
Shorter tests or those using glucose can miss key information, especially if the overgrowth is further down the small intestine.
A 3-hour lactulose test reduces the chance of a false negative and helps us tailor treatment more precisely.
The labs we work with are reputable, easy to use at home, and ship worldwide. Once your sample is received, results are usually ready within 7–10 days.
What Are Your Options?
There are two main ways we can help, depending on where you're at:
1. If you haven’t done a SIBO test yet, you can order one directly through this page. We’ve listed the best options based on where you live (Australia, US, UK, etc.) so you can get the right test, from a lab we trust.
2. If you already have test results but aren’t sure how to interpret them - or what to do next - you can book an interpretation session with our team. We’ll explain exactly what your results mean and how to use them to guide treatment.
Scroll down to find the option that fits your situation.
OPTIONS
Choose the one that's right for you
KIT + INTERPRETATION
Order a 3-hour lactulose breath test (shipped to your door) with professional interpretation included.
Once your results are in, we’ll review your test, identify the type of SIBO, and provide clear treatment guidance based on your findings.
INTERPRETATION ONLY
Already have SIBO test results? Book this option for a professional interpretation.
We’ll review your report, identify the type and pattern of overgrowth, and give you straightforward guidance on what your next steps should be.
