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 Brits, 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.
03Book an appointment
Book an appointment for your blood draw at a convenient time and location.
04Get your results
Your results land in your secure dashboard with plain-English explanations from our health team, typically within 2–3 weeks.
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 Microbiomics test different, and read how fibre shapes your gut microbiome.
The stool test is a comprehensive collection of microbial targets as well as immune, inflammation and digestive markers. It screens for pathogenic bacteria, commensal bacteria, opportunistic pathogens, fungi, viruses, and parasites.
The panel is a comprehensive collection of microbial targets as well as immune, inflammation and digestive markers. It screens for pathogenic bacteria, commensal bacteria, opportunistic pathogens, fungi, viruses, and parasites.
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.
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.
Discover what's really happening inside your child's gut with the most advanced paediatric microbiome test available. Powered by metagenomic shotgun sequencing and quantitative PCR, our Paediatric-Biome test delivers precise, age-specific insights into your child's gut bacteria, digestive function, immunity, and overall health - giving you a clear roadmap to support their wellbeing, behaviour, and development.
Give your toddler the best possible start with the most advanced infant gut microbiome test available. Powered by metagenomic shotgun sequencing and quantitative PCR, this test delivers precise, age-specific insights into your little one's developing gut - with results interpreted using a developmentally informed framework that accounts for delivery mode, feeding type, and early microbial 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.
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.
Australia’s most comprehensive PCR worm test screening for hookworm, roundworm, tapeworm and other helminths.
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 the population 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). 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.
Do you have food intolerances driving bloating or IBS?
Food reactions are a common cause of digestive symptoms. Our extensive food intolerance test and food sensitivity test range helps to identify triggering foods that may be contributing to IBS, gas, bloating, skin issues or fatigue. View our guide to food intolerance testing here.
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. Our comprehensive Food Intolerance Check includes screening for 120 foods.
Allergies are on the increase and food allergies, in particular, are becoming more common. Allergies are caused by an overreaction of the body’s immune system to a protein. These proteins may be from foods, pollens, house dust, animal hair or moulds, and are called allergens.
Allergies are on the increase and food allergies, in particular, are becoming more common. Allergies are caused by an overreaction of the body’s immune system to a protein. These proteins may be from foods, pollens, house dust, animal hair or moulds, and are called allergens.
Coeliac disease is an autoimmune disorder triggered by gluten that can cause severe digestive problems. It affects 1 in 70 individuals who are mostly diagnosed in adulthood.
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.
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'.
Stool test measuring pancreatic elastase — a marker relevant to digestive enzyme function.
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.
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.
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.
Breath test measuring hydrogen and methane levels — markers relevant to small intestinal bacterial balance. Find out more with a simple breath test.