Gut Health & Digestion Tests
Gut Health & Digestion Tests
Bloating, discomfort, irregular bowel habits or reactions to food can be frustrating, especially when you’re not sure where to start. Our at-home gut tests give you a detailed look at your gut microbiome, digestive markers, inflammation and more, analysed by accredited UK laboratories.
Your results come with plain-English explanations from our health team, so you can have a more informed conversation with your GP, dietitian or practitioner.
Which gut microbiome test is right for me?
Three ways to look at your gut microbiome, from a solid first overview to species-level sequencing. Still unsure? Our health team can help you choose. Find out what makes our Advanced GutIQ test different.
A first look at beneficial and pathogenic bacteria, parasites, yeast and digestive markers from one stool sample.
DNA-based PCR measuring specific bacteria, pathogens, parasites, viruses and inflammation markers.
Sequences the DNA of your whole gut community to profile species, digestive function, immune and inflammation markers.
Advanced Microbiome GutIQ, Leaky Gut test, SIBO breath test and an IgG food intolerance panel in one order.
Gut testing for babies and children
Age-specific microbiome analysis for children and infants, with results interpreted against developmental reference ranges. If your child has persistent symptoms, please speak to your GP first.
Metagenomic sequencing and qPCR with age-specific insights into your child's gut bacteria, digestive and immune markers.
Infant gut analysis interpreted in the context of 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, it's worth knowing that treatment isn't always needed 0 both are commonly found in people with no symptoms, and the evidence on when to treat is still evolving. There's no single UK guideline on this, so the right approach depends on your symptoms and should be decided with your GP or gut health specialist.
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.
The UK’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.
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 Food Sensitivity Test (IgG 96) includes screening for 96 Western foods and IgG antibodies.
A 96-food intolerance panel tailored to plant-forward diets, with a wide grain, legume, nut and vegetable range. Includes an IgG screen for 96 foods.
A 96-food intolerance panel weighted toward foods common in Asian diets, with an expanded fruit and rice range. Includes an IgG screen for 96 foods.
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 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.
Breath test measuring hydrogen and methane over three hours, using both glucose and lactulose substrates. Markers relevant to bacterial overgrowth in the small intestine.
Breath test measuring hydrogen and methane levels — markers relevant to small intestinal bacterial balance. Find out more with a simple breath test.
Frequently Asked Questions
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.
Related health goals
Explore related testing areas and connected health goals.