Improve Gut Health & Digestion
Your gut plays a crucial role in digestion, immunity, mood and overall wellbeing. If you’re experiencing bloating, abdominal discomfort, IBS symptoms or food reactions, our advanced range of gut health tests can help you uncover the underlying cause. We offer everything from comprehensive gut health test options to targeted SIBO breath tests, stool tests, food intolerance tests, and the best gut microbiome tests in Australia. Whether you're trying to understand how to improve gut microbiome health, identify digestive imbalances or confirm suspected gut infections, our scientifically backed tests give you the clarity you need to take control of your digestive wellbeing. With bowel cancer rates rising in younger Australians, proactive gut screening has never been more important.
How i-screen works
01Order online
Choose your preferred blood test and place your order securely through our website.
02Receive pathology request form
We'll email you your pathology request form, which you'll need for your blood draw.
03Visit a Collection Centre
Take your pathology request form to one of our affiliated collection centres for your blood sample.
04Get your results
Your results are typically available within 48 hours depending on the test. We'll notify you by email when your results are ready to view in your i-screen dashboard.
Want the most complete picture of what’s affecting your gut?
If you’re looking for the best gut microbiome test or a full digestive assessment, these comprehensive panels analyse your microbiome, digestion, inflammation, pathogens and gut barrier integrity in a single test. They are ideal for chronic gut symptoms, IBS, or anyone wanting a deep dive into their gut ecosystem. Find out what makes our Microbiomix test different, and read how fibre shapes your gut microbiome.
Analyse beneficial and pathogenic bacteria, parasites, yeast and digestive markers with a simple at-home stool test.
Advanced DNA-based PCR gut test measuring bacteria, pathogens, parasites, viruses and inflammation markers.
Metagenomic shotgun sequencing analysing gut bacteria, digestive function, immunity and inflammation in clinical detail.
This comprehensive gut health panel, combining multiple advanced assessments to provide a complete picture of digestive function. It includes the Microbiomix Advanced Gut, a Food Intolerance Test, an Intestinal Permeability (Leaky Gut) Test, and a breath test for SIBO to measure bacterial overgrowth in the small intestine. Together, these offer an in-depth, holistic understanding of your gut health.
Looking for comprehensive gut screening for your children?
Our paediatric gut microbiome tests deliver an in-depth analysis of the bacteria, fungi, and microorganisms making up your child's unique digestive ecosystem — because a balanced gut affects far more than digestion, with research linking it to immunity, mood, behaviour, and cognitive development. Whether your child struggles with bloating, food intolerances, frequent illness, or unexplained changes in mood and energy, our clinically backed panels can help uncover the answers.
Advanced paediatric gut test with age-specific microbiome insights for children’s digestion, immunity and development.
Infant-specific microbiome analysis accounting for delivery mode, feeding type and early microbial development milestones.
Could parasites or infection be causing symptoms?
Digestive infections can cause bloating, diarrhoea, pain, nausea and fatigue. These highly sensitive stool tests detect parasites, harmful bacteria and yeast overgrowth that standard pathology often misses. If you’ve been diagnosed with Blastocystis or Dientamoeba fragilis, read the Australian clinical practice guidelines for treatment to understand the latest evidence-based approach.
PCR stool test screening for Blastocystis, Dientamoeba and other parasites commonly missed in standard pathology.
Australia’s most comprehensive PCR worm test screening for hookworm, roundworm, tapeworm and other helminths.
Non-invasive breath test for H. pylori — a common stomach bacterium. Discuss results with your GP.
Helicobacter pylori (H. pylori) is a bacteria that infects the stomach, and is now known to be a major cause of peptic ulcer disease. One third of Australians are believed to carry the bug, but many don’t realise they have it.
A Clostridium difficile test tests for harmful bacteria in your gut that can cause severe digestive symptoms, including persistent diarrhoea and abdominal pain. This test identifies toxins produced by C. diff to confirm active infection quickly and accurately.
There are medical explanations and labels for many gut problems, but the big exception is Irritable Bowel Syndrome (IBS). This calprotectin stool test measures a key marker of gut inflammation. Discuss results with your GP.
Do you have food intolerances driving bloating or IBS?
Food reactions are a common cause of digestive symptoms. Our food intolerance test and food sensitivity test Australia options identify triggering foods that may be contributing to IBS, gas, bloating, skin issues or fatigue.
A food intolerance occurs when someone has difficulty digesting a particular food - this can lead to symptoms such as intestinal gas, abdominal pain or diarrhoea. This Food Intolerance Check includes a screen for 96 foods.
FODMAPs are naturally occurring sugars found in milk and dairy products, fruits and vegetables, cereals and processed foods. These dietary sugars are poorly absorbed in the gut and can cause symptoms of irritable bowel syndrome.
Lactose breath test.
Measure coeliac antibody markers. Coeliac disease affects approximately 1 in 70 Australians. Discuss results with your GP.
Test for HLA-DQ2 and HLA-DQ8 gene variants — markers relevant to coeliac disease susceptibility.
Is leaky gut or poor digestion affecting your whole body?
Leaky gut (increased intestinal permeability) and impaired digestion can cause inflammation, poor nutrient absorption, fatigue, skin problems and digestive discomfort. These tests measure gut barrier function, digestive enzymes and inflammatory markers.
The Zonulin Test is designed to measure levels of zonulin, a protein that regulates the tight junctions in your gut lining. Elevated zonulin can be a marker of increased intestinal permeability, often referred to as “leaky gut.
Measure markers associated with intestinal permeability — relevant to gut barrier health.
Stool test measuring pancreatic elastase — a marker relevant to digestive enzyme function.
A screening test for blood in the stool — results should be discussed with your GP.
There are medical explanations and labels for many gut problems, but the big exception is Irritable Bowel Syndrome (IBS). This calprotectin stool test measures a key marker of gut inflammation. Discuss results with your GP.
Is SIBO behind your bloating or fatigue?
Small Intestinal Bacterial Overgrowth (SIBO) is a leading cause of IBS symptoms, bloating, gas and nausea. Our SIBO test options use highly accurate SIBO breath tests to detect hydrogen and methane gases associated with bacterial overgrowth. You’ll also receive guidance on how to prepare for a SIBO breath test for the most accurate results.
Breath test measuring hydrogen and methane levels — markers relevant to small intestinal bacterial balance. Find out more with a simple breath test.
Breath test measuring hydrogen and methane levels — markers relevant to small intestinal bacterial balance. Find out more with a simple breath test.
Breath test measuring hydrogen and methane levels — markers relevant to small intestinal bacterial balance. Find out more with a simple breath test.