Comprehensive Stool Test (GI-MAP) + Zonulin home test kit What the GI-MAP + Zonulin test measures Lab Findings Review video call, with the sample report on screen A page from the sample GI-MAP report: commensal bacteria against reference ranges

Gut microbiome test · At-home stool sample · UK clinic

Comprehensive Stool Test (GI-MAP) + Zonulin

5.0 · 10 verified reviews
£455.00

The GI-MAP + Zonulin is an at-home stool test from a UK clinic that maps your gut microbiome and screens for pathogens, parasites and leaky gut. 88 markers from one sample, analysed by quantitative PCR. Ideal for persistent bloating, IBS, fatigue or skin flare-ups, especially when standard tests come back clear.

  • Free UK delivery and prepaid return by DHL
  • Results in 21 working days
Free Discovery Call

Not sure if this is the right test for you? Book a free 15-minute Discovery Call with a registered practitioner.

What you receive

Your at-home test kit, laboratory analysis of your stool sample by quantitative PCR, plus lab report measuring 88 markers across ten groups, each one quantified and flagged against the lab’s reference ranges. View a sample lab report.

Delivery and turnaround

Free UK delivery and prepaid return, both by DHL courier. Kits are dispatched within 1 to 2 working days and delivered the next working day. Results ready approximately 21 working days from when the lab receives your sample. International delivery is available, with costs calculated at checkout.

What this test measures

What does the GI-MAP + Zonulin test for?

It tests for bacteria, H. pylori, parasites, fungi and viruses in your gut, checks digestion and inflammation, and measures zonulin, the marker of leaky gut. It is the gold-standard stool test in functional medicine, analysed by quantitative PCR, unlike consumer microbiome kits.

Digestion & inflammation

Shows you how well you are digesting and absorbing your food, and whether your gut is inflamed.

H. pylori

Tells you whether you carry the stomach bacterium linked to reflux, gastritis and ulcers, and, if so, how aggressive it is.

Pathogens, parasites & fungi

Checks whether an infection, a parasite or a yeast overgrowth is behind your symptoms.

Your gut microbiome

Shows you whether your gut bacteria are in balance, or whether an imbalance (dysbiosis) could explain your symptoms.

Zonulin

Tells you whether you have leaky gut (intestinal permeability), using zonulin, the key marker most gut tests cannot measure.

See all 88 markers, in ten groupsTap or click a group to see every marker in it
Section of a sample GI-MAP report
From a sample GI-MAP report: every organism is quantified and shown against its reference range. The groups below list all 88 markers.
Bacterial pathogens

Bacteria that cause acute gut infection.

  • C. difficile toxin A
  • C. difficile toxin B
  • Campylobacter
  • E. coli EPEC/EHEC
  • E. coli O157
  • Enteroinvasive E. coli / Shigella
  • Enterotoxigenic E. coli LT/ST
  • Salmonella
  • Shiga-like toxin E. coli stx1
  • Shiga-like toxin E. coli stx2
  • Vibrio cholerae
  • Yersinia enterocolitica
Commensal / keystone bacteria

The beneficial bacteria a healthy gut depends on.

  • Akkermansia muciniphila
  • Bacteroides fragilis
  • Bacteroidetes
  • Bifidobacterium spp.
  • Enterobacter spp.
  • Enterococcus spp.
  • Escherichia spp.
  • Faecalibacterium prausnitzii
  • Firmicutes
  • Firmicutes : Bacteroidetes ratio
  • Lactobacillus spp.
  • Roseburia spp.
Digestion, immune & inflammation markers

Markers of digestive function, gut immune defence, gluten reactivity, inflammation and hidden blood in the stool.

  • β-Glucuronidase
  • Anti-gliadin IgA
  • Calprotectin
  • Elastase-1
  • Eosinophil activation protein (EDN)
  • Occult blood (FIT)
  • Secretory IgA
  • Steatocrit
Dysbiotic & overgrowth bacteria

Normally harmless bacteria that cause symptoms when they overgrow.

  • Bacillus spp.
  • Desulfovibrio spp.
  • Enterococcus faecalis
  • Enterococcus faecium
  • Methanobacteriaceae
  • Morganella spp.
  • Pseudomonas aeruginosa
  • Pseudomonas spp.
  • Staphylococcus aureus
  • Staphylococcus spp.
  • Streptococcus spp.
Fungi, yeast & viruses

Candida and other yeasts and fungi, plus two viruses that affect immune function.

  • Candida albicans
  • Candida spp.
  • Cytomegalovirus
  • Epstein-Barr virus
  • Geotrichum spp.
  • Microsporidium spp.
  • Rhodotorula spp.
H. pylori & virulence factors

The stomach bacterium associated with reflux, gastritis and ulcers, and its virulence genes.

  • babA
  • cagA
  • dupA
  • Helicobacter pylori
  • iceA
  • oipA
  • vacA
  • virB
  • virD
Inflammatory & autoimmune-related bacteria

Bacteria associated with gut inflammation and autoimmune conditions.

  • Citrobacter freundii
  • Citrobacter spp.
  • Enterobacter spp.
  • Escherichia spp.
  • Fusobacterium spp.
  • Klebsiella pneumoniae
  • Klebsiella spp.
  • M. avium subsp. paratuberculosis
  • Prevotella spp.
  • Proteus mirabilis
  • Proteus spp.
Intestinal permeability: zonulin

Zonulin regulates the tight junctions between the cells of your gut lining. A raised level is the recognised marker of increased intestinal permeability, or leaky gut, which is linked to food sensitivities, inflammation, and skin and autoimmune conditions. It is the marker that sets this test apart, and most gut tests cannot measure it.

  • Zonulin
Parasites: protozoa & worms

Single-celled parasites such as Blastocystis and Dientamoeba, and intestinal worms including roundworm, hookworm, whipworm and tapeworm.

  • Ancylostoma duodenale
  • Ascaris lumbricoides
  • Blastocystis hominis
  • Chilomastix mesnili
  • Cyclospora spp.
  • Dientamoeba fragilis
  • Endolimax nana
  • Entamoeba coli
  • Necator americanus
  • Pentatrichomonas hominis
  • Taenia spp.
  • Trichuris trichiura
Parasitic & viral pathogens

Infectious parasites and viruses behind gastrointestinal illness.

  • Adenovirus 40/41
  • Cryptosporidium
  • Entamoeba histolytica
  • Giardia
  • Norovirus GI/II
Is this test right for me?

Who is the GI-MAP + Zonulin test for?

Anyone with persistent digestive symptoms such as bloating, IBS or reflux, suspected leaky gut, or skin, inflammatory and autoimmune conditions where the gut may play a part.

Acne, eczema, rashes

Often linked to: gut inflammation, dysbiosis and leaky gut.

This test measures: inflammatory bacteria, calprotectin and zonulin.

Anxiety & low mood

Often linked to: dysbiosis, inflammation and leaky gut, through the gut-brain axis.

This test measures: beneficial and overgrown bacteria, calprotectin and zonulin.

Bloating & gas

Often linked to: bacterial overgrowth, low digestive enzyme output or H. pylori.

This test measures: overgrowth and methane-producing bacteria, elastase for enzyme output, and H. pylori.

Brain fog

Often linked to: dysbiosis, leaky gut and inflammation, through the gut-brain axis.

This test measures: bacterial balance, zonulin and calprotectin.

Chronic fatigue

Often linked to: poor absorption, a chronic gut infection or a leaky, inflamed gut.

This test measures: elastase and steatocrit for digestion, pathogens and parasites, and zonulin.

Constipation

Often linked to: an imbalanced microbiome, low keystone bacteria and methane-producing overgrowth.

This test measures: keystone species such as Akkermansia, and Methanobacteriaceae.

Cramps & stomach pain

Often linked to: a gut infection, inflammation or H. pylori.

This test measures: bacterial, parasitic and viral pathogens, calprotectin for inflammation, and H. pylori.

Diarrhoea

Often linked to: an infection, a parasite or gut inflammation.

This test measures: salmonella, C. difficile, Giardia, Cryptosporidium, Blastocystis and more, plus calprotectin.

Headaches & migraines

Often linked to: gut permeability and an imbalanced microbiome.

This test measures: zonulin and the full bacterial map.

Heartburn

Often linked to: H. pylori, a common driver of reflux and gastritis.

This test measures: h. pylori and eight virulence factors, which show how aggressive the strain is.

IBS / IBD

Often linked to: overgrowth, a lingering infection or a post-infectious gut; IBD flares show as raised calprotectin.

This test measures: pathogens, parasites, overgrowth bacteria, and calprotectin.

Joint pain

Often linked to: leaky gut, and bacteria associated with inflammation and autoimmunity.

This test measures: zonulin, and Klebsiella, Proteus, Citrobacter and related species.

Poor sleep

Often linked to: gut imbalance and inflammation, both of which can disrupt sleep.

This test measures: the microbiome map and inflammation markers.

Thyroid & autoimmune

Often linked to: leaky gut, and bacteria associated with autoimmune conditions.

This test measures: zonulin, and the inflammatory and autoimmune-related bacteria group.

Weight struggles

Often linked to: low keystone bacteria such as Akkermansia, and overgrowth.

This test measures: keystone species, the Firmicutes to Bacteroidetes ratio, and overgrowth bacteria.

Sound familiar?Order the test today, or book a free 15-minute Discovery Call and a registered practitioner can help you decide if it is right for you.
How it works

How does the at-home GI-MAP stool test work?

You collect a single sample at home with everything provided in the kit, and DHL collects it from your door.

What arrives in the GI-MAP kit

Order online

Secure checkout. No clinic visit or GP referral required.

Your kit arrives by courier

Dispatched within 1 to 2 working days. Delivered next day by DHL.

Collect sample at home

One stool sample, following the instructions in the kit.

Return by prepaid courier

Book a free DHL collection online. Results ready in 21 working days.

Carmen Martinez-Vidal
Get the most out of your results

How do I interpret my results?

Making sense of a lab report is the most important part of testing. Once your results are ready, your lab report is uploaded to your secure Client Folder. From there, you choose your level of support from our UK-registered nutritional therapist (optional, priced separately): a Lab Findings Review or a Comprehensive Consultation.

Carmen Martinez-Vidal Founder & Lead Practitioner · Over 15 years in functional medicine
BSc, mBANT, CNHC, NLP Dip
BANTCNHC
What happens next

Which consultation is right for me?

Understand your results with a Lab Findings Review, or go a step further and act on them with a Comprehensive Consultation.

A client on a consultation video call at home
Understand your results

Lab Findings Review

£99
45 minutes · One to one, online, with a registered practitioner
  • Clinical analysis of your lab results
  • What the findings mean for your symptoms and health
  • Time for your questions
Learn more about the Lab Findings Review →
Act on them

Comprehensive Consultation

£180
60 minutes · One to one, online, with a registered practitioner
  • Everything in the Lab Findings Review
  • In-depth review of your health history, diet and lifestyle (Health Questionnaire and Food & Symptoms Diary)
  • A fully personalised nutrition & lifestyle action plan
Learn more about the Comprehensive Consultation →
Not sure which level of support is right for you?A free 15-minute Discovery Call with a practitioner can help you decide.
Book a free Discovery Call
Reviews

What do our customers say?

5.0from 10 verified customers

“The GI-MAP with Zonulin gave me the deep answers standard medical tests missed. The home collection kit was straightforward, and shipping it back was easy. The results were incredibly detailed and insightful.”

Claire EVerified customer

A year of bloating and brain fog, then a plan that worked

The GI Map plus Zonulin test uncovered a number of issues, from bacterial overgrowth to leaky gut. With real answers in hand, I was able to start a thoughtful, intentional protocol. I'm happy to say that after time and dedication to what she recommended, my symptoms are gone.

SamanthaVerified customer

Results that explained years of severe eczema

It was a real eye opener as it confirmed what I was thinking for many months before the test, that I had a bad leaky gut. Me and Carmen then had a clear gameplan setup how to tackle healing my leaky gut and getting long lasting relief.

IshVerified customer

Write a review

Good to know

Frequently Asked Questions

Can I do the GI-MAP + Zonulin test at home in the UK?

Yes. It is an at-home stool test: you order online, the kit comes to your door, you collect one small sample at home and send it back with the prepaid return. No GP referral or clinic visit is needed. We deliver to any UK address, and international delivery is available at checkout.

Can the GI-MAP be used for children?

Yes. The GI-MAP is suitable for children from 2 years of age, where a more detailed assessment of gut health and the gut microbiome is appropriate. If you are unsure whether it is the right test for your child, book a free Discovery Call and a registered practitioner will help you decide.

What is the difference between the GI-MAP and the GI-MAP + Zonulin?

The GI-MAP + Zonulin includes every marker on the GI-MAP and adds zonulin, the marker of intestinal permeability (leaky gut). Choose the GI-MAP with zonulin when symptoms reach beyond the gut, such as skin flare-ups, fatigue or inflammatory and autoimmune conditions.

Is the GI-MAP test worth it if I don’t have digestive symptoms?

Yes. Leaky gut and gut imbalances often show up outside the gut, as fatigue, brain fog, skin problems, joint pain or autoimmune conditions. If your symptoms are ongoing and standard tests have come back clear or inconclusive, the GI-MAP looks where they do not.

How accurate is the GI-MAP test?

The GI-MAP is made by one laboratory, Diagnostic Solutions Laboratory, and analysed by quantitative PCR (qPCR), which detects the DNA of each organism and measures how much is present. That measurement is what lets a practitioner tell a trace from an active infection, and it is the difference between a clinical test and a standard consumer microbiome kit, which uses sequencing to report relative abundance. If a test is not from Diagnostic Solutions Laboratory, it is not the GI-MAP. Like any lab test, the report is a snapshot, which is why a practitioner reads it against your symptoms and history.

Can I get the GI-MAP test on the NHS?

No. The NHS does not offer the GI-MAP or comprehensive gut microbiome testing; NHS stool tests look for specific infections or blood. The GI-MAP is a private test ordered through a clinic. The price covers the kit, the lab analysis and your lab report; having the report interpreted is a separate, optional consultation.

When should I collect my sample?

On a Sunday or Monday. The sample must be shipped within 24 hours of collection and DHL does not collect at weekends, so collect on Sunday or Monday and book your free DHL collection for the next day. Keep the packed envelope in the fridge until the driver arrives. Full instructions are in the kit.

What should I be aware of before collecting my sample?

Your kit includes full collection instructions. To make your sample as representative as possible, please note the following before you collect it.

  • Allow at least 2 weeks after finishing a course of antibiotics, antifungals, antiparasitic treatments or other antimicrobial protocols.
  • Stop probiotic supplements 2 weeks before collection.
  • Stop non-essential prebiotics and other gut-support supplements 7 days before collection.
  • Stop digestive enzymes, betaine HCl, antacids, activated charcoal and bentonite clay 3 days before collection.
  • If you have recently had a colonoscopy or barium enema, wait at least 4 weeks.
  • Do not collect during menstruation or while you have active bleeding from haemorrhoids.
  • If constipation makes collection difficult, contact us for advice before using laxatives, enemas or suppositories.

Never stop prescribed medication without first consulting your doctor or prescriber. If you take a proton pump inhibitor (PPI) or another prescribed medication that may affect the gut environment, or you are unsure whether anything you take could affect your results, contact us before collecting your sample and we will advise you.

Can someone help me interpret my GI-MAP results, even if I tested elsewhere?

Yes. Book a Lab Findings Review with us and a registered nutritional therapist will take you through every marker against your symptoms and history, whether you tested with us or elsewhere; bring your report to the session. If you then want a personalised plan, that is the Comprehensive Consultation.

Keep reading

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