Overview
Basics of SIBO
SIBO has long been misunderstood, mistreated, and misdiagnosed.
SIBO is one of the leading causes of IBS and is treatable and manageable, yet sufferers often go years without an answer or treatment.
Much of what we know has come to light in recent years, so many medical professionals are yet to have a deep understanding of:
- the signs and symptoms
- how to test for it
- how to diagnose it
- the best treatment options are based on the most up to date medical literature
- underlying causes and risk factors
Instead, the umbrella diagnosis (which isn’t a diagnosis) of IBS is often used.
The ‘basic’ tab has been designed to help you understand the basics of SIBO, so you can better advocate for your gut health.
Find out more >

What is SIBO/ what is IBS
We explain what SIBO (small intestinal bacterial overgrowth) is. We also explain what SIFO is (small intestinal fungal overgrowth).
We go through the symptoms of SIBO and SIFO based on the medical literature.
We also explain what IBS, IBS-M, IBS-D is as these are often given as umbrella diagnoses when SIBO has been missed.
Dr Freeman comments on why SIBO is frequently missed from his professional perspective.
All about the small intestine
Here we explain what your small intestine does and why it’s essential to your gut and overall health. We talk about it…


Types of SIBO
We explain the different types of SIBO, of which there are three. They all present with various symptoms.
- SIBO-methane
- SIBO-hydrogen
- SIBO-hydrogen sulfide
The last was only recently uncovered, and that goes to show how quickly we are learning about the gut and how much we still have to learn.
Diagnosis of SIBO
Here we explore how SIBO is diagnosed to help you get to the bottom your gut issues depending on the resources you have access to.
Many routine tests (performed by doctors) come back normal despite severe SIBO. That is because the bacteria that cause SIBO is supposed to be there, just not where it has started to grow.
We explore:
- How SIBO is best diagnosed
- Why do colonoscopies/endoscopies often show nothing for SIBO
- Why stool testing is not considered adequate for SIBO


Why SIBO is underdiagnosed
We explain why SIBO is underdiagnosed and why you might be struggling to find a doctor who can get to the bottom of your gut issues.
We do a Q and A with one of our doctors – Dr Freeman, about this issue.
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