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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 Australia 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.

How i-screen works

Whether you're checking a baseline, monitoring a condition, or optimising performance, i-screen helps you find the right tests based on what matters to you.

01Order online

Choose your preferred blood test and place your order securely through our website.

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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.

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04Get your results

Your results are typically available within 48 hours depending on the test. We'll notify you by email when your resuts 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 Australia 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.

Best seller
Test Kit
Precision Gut Function Blueprint
187 tests included
$1999 AUD
Our Precision Gut Function Blueprint is the most advanced gut test available, combining full metagenomic microbiome sequencing, clinical stool biomarkers, and targeted genetic insights. It provides a clear, science-backed understanding of your digestion, immunity, metabolism, and inflammation. Your results are reviewed in a professional consult, and you’ll receive a personalised meal plan tailored to your microbiome, giving you practical, confident steps to improve gut health and support long-term wellbeing.
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Test Kit
Microbiomix Advanced Gut Test
187 tests included
$599 AUD
Discover what’s really happening inside your gut with the most advanced microbiome test available. Powered by metagenomic shotgun sequencing, Microbiomix delivers precise insights into your gut bacteria, digestive function, immunity, and overall health. It’s your roadmap to better digestion, stronger resilience, and long-term well-being.
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Test Kit
Complete Microbiome Mapping (PCR) - GI Map
91 tests included
$569 AUD
The Complete Microbiome Mapping (GI Map) uses PCR technology to analyse gut bacteria, pathogens, and digestive health markers. It provides a clear picture of microbiome balance and identifies issues that may impact overall health. This test helps guide personalised gut health strategies.
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What’s really happening in your gut microbiome?

Your microbiome influences digestion, immunity, inflammation and even mood. Our gut microbiome test options use advanced sequencing and PCR technology to analyse beneficial bacteria, pathogens, fungi and microbial diversity. Perfect if you're searching for how to improve gut microbiome health through personalised insights.

Test Kit
Microbiomix Advanced Gut Test
187 tests included
$599 AUD
Discover what’s really happening inside your gut with the most advanced microbiome test available. Powered by metagenomic shotgun sequencing, Microbiomix delivers precise insights into your gut bacteria, digestive function, immunity, and overall health. It’s your roadmap to better digestion, stronger resilience, and long-term well-being.
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Test Kit
Complete Microbiome Mapping (PCR) - GI Map
91 tests included
$569 AUD
The Complete Microbiome Mapping (GI Map) uses PCR technology to analyse gut bacteria, pathogens, and digestive health markers. It provides a clear picture of microbiome balance and identifies issues that may impact overall health. This test helps guide personalised gut health strategies.
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Test Kit
Microbiome Check
32 tests included
$239 AUD
As well as analysing your beneficial and pathogenic bacteria, our comprehensive microbiome test also includes testing for parasites and yeast overgrowth, and also provides an assessment of your digestive markers. This holistic picture provides actionable insights to help you improve your gut health.
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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.

Test Kit
Parasite PCR Test
13 tests included
$120 AUD
Some gut problems can be a consequence of an undetected gut infection. A significant number of IBS (irritable bowel syndrome) cases could actually be due to undiagnosed gut pathogens such as Blastocystis hominis and Dientamoeba fragilis.
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Test Kit
Worms and Helminths Test
9 tests included
$135 AUD
Some gut problems can be a consequence of an undetected worm infection. This is the most comprehensive worm stool test available in Australia and uses advanced PCR technology to maximise detection.
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Helicobacter Pylori Breath Test
1 test included
$129 AUD
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.
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Helicobacter Pylori Antigen (stool)
1 test included
$55 AUD
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.
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Test Kit
Clostridium Difficile Test
2 tests included
$120 AUD
A Clostridium difficile test detects 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. Early detection helps guide effective treatment and prevent complications or spread to others.
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Test Kit
Gut Inflammation Test
1 test included
$110 AUD
There are medical explanations and labels for many gut problems, but the big exception is Irritable Bowel Syndrome (IBS). Since many gut disorders have similar symptoms to IBS, ruling out a more serious underlying gut disease such as inflammatory bowel disease is an important first step.
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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.

Test Kit
Food Intolerance Test
96 tests included
$379 AUD
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.
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Test Kit
FODMAP Test
2 tests included
$289 AUD
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.
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Test Kit
Lactose Intolerance Test
2 tests included
$149 AUD
Lactose breath test.
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Coeliac Test
2 tests included
$69 AUD
Coeliac disease is an autoimmune disorder triggered by gluten that can cause severe digestive problems. It affects 1 in 70 Australians who are mostly diagnosed in adulthood.
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Coeliac HLA Typing Test
1 test included
$169 AUD
Patients with coeliac disease almost always have specific variants of HLA-DQ2 and HLA-DQ8. These variants are necessary, but not sufficient, for the disease to occur.
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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.

Test Kit
Zonulin Test
1 test included
$120 AUD
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.
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Test Kit
Leaky Gut Test
3 tests included
$210 AUD
When the lining of the intestine and gut microbiome are compromised, unwanted substances can cross the barrier into the blood and activate an immune response in a condition known as 'leaky gut' or 'intestinal permeability'.
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Test Kit
Pancreatic Insufficiency Test
1 test included
$120 AUD
If you're experiencing signs of malabsorption, stomach cramps, weight loss, malnutrition, or loose fatty stools, then pancreatic insufficiency could be to blame. Pancreatic insufficiency is the inability of the pancreas to deliver enough digestive enzymes to break down food in the intestine so it can be absorbed.
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Bowel Screen Test
3 tests included
$129 AUD
​Australia has one of the highest rates of bowel cancer globally, with 1 in 13 Australians developing the disease in their lifetime. Early detection is crucial, as 90% of bowel cancer cases can be successfully treated when identified early.
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Test Kit
Gut Inflammation Test
1 test included
$110 AUD
There are medical explanations and labels for many gut problems, but the big exception is Irritable Bowel Syndrome (IBS). Since many gut disorders have similar symptoms to IBS, ruling out a more serious underlying gut disease such as inflammatory bowel disease is an important first step.
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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.

Test Kit
SIBO - Lactulose
2 tests included
$150 AUD
If the small intestine becomes overgrown with bacteria it can lead to malabsorption of key nutrients and symptoms of irritable bowel syndrome. Find out more with a simple breath test.
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Test Kit
SIBO Breath Test (Glucose + Lactulose)
2 tests included
$269 AUD
If the small intestine becomes overgrown with bacteria it can lead to malabsorption of key nutrients and symptoms of irritable bowel syndrome. Find out more with a simple breath test.
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Test Kit
SIBO - Lactulose + Glucose + Fructose
3 tests included
$399 AUD
If the small intestine becomes overgrown with bacteria it can lead to malabsorption of key nutrients and symptoms of irritable bowel syndrome. Find out more with a simple breath test.
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Frequently Asked Questions