Improve Gut Health & Digestion
Your gut plays a central role in digestion, immunity, mood and overall wellbeing. If you're experiencing bloating, abdominal discomfort, IBS-type symptoms or food reactions, our range of gut health tests can help you explore the underlying picture. We offer comprehensive gut microbiome tests, targeted SIBO breath tests, stool tests, plus dedicated food intolerance and sensitivity testing. Order online, no GP referral needed. Gut health matters more than ever, with bowel cancer rates rising in younger Australians.
How i-screen works
Order online
Choose your preferred blood test and place your order securely through our website.
Receive pathology request form
We'll email you your pathology request form, which you'll need for your blood draw.
Visit a Collection Centre
Take your pathology request form to one of our affiliated collection centres for your blood sample.
Get 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.
Choose your focus
Jump straight to the area that best matches your goal or symptoms
Want the most complete picture of what’s affecting your gut?
For the best gut microbiome test or a full digestive assessment, these panels analyse microbiome, digestion, inflammation, pathogens and gut-barrier markers - ideal for chronic gut symptoms or a deep dive. Read how fibre shapes your gut microbiome, and what makes our Microbiomics test different.
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 Microbiomics 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.
Could parasites or infection be causing symptoms?
Digestive infections can cause bloating, diarrhoea, pain, nausea and fatigue. These sensitive stool and breath tests look for parasites, bacteria and yeast markers standard pathology can miss. If you've been diagnosed with Blastocystis or Dientamoeba, see the treating blastocystis and dientamoeba.
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.
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.
Do food intolerances drive your bloating or IBS?
Food reactions are a common cause of digestive symptoms. Our IgG food intolerance test, plus FODMAP, lactose and coeliac testing, helps identify foods that may be contributing. See our full food intolerance testing page.
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 Test includes an IgG screen for 96 common 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.
Is leaky gut or poor digestion affecting your whole body?
Increased intestinal permeability (“leaky gut”) and impaired digestion can relate to inflammation, absorption, fatigue and discomfort. These tests measure gut-barrier, enzyme 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.
Combines a faecal occult blood test (detects blood in the stool) with calprotectin (a gut-inflammation marker). Not a diagnosis; discuss results with your GP.
Is SIBO behind your bloating or fatigue?
Small Intestinal Bacterial Overgrowth (SIBO) is a common contributor to IBS-type symptoms, bloating and gas. These breath tests measure hydrogen and methane. Full prep instructions come with your kit.
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.
Looking for comprehensive gut screening for your children?
Our paediatric gut microbiome tests analyse the bacteria, fungi and microorganisms in your child’s digestive ecosystem - relevant where a child has bloating, food reactions, frequent illness, or mood and energy changes.
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.