Uncover the root causes of ill-health with Gastrointestinal Mapping. Receive 360 analysis of your gut bacteria, including inflammation, intestinal permeability, and parasitic, fungal and viral pathogens. Gut health plays a crucial role in overall wellness and a key role in the development of certain chronic diseases. GI Mapping is a cornerstone Functional Medicine test— essential for anyone struggling with chronic illness, digestive Issues or unexplained symptoms.
Includes:
£580.00





The GI-MAP + Zonulin Add-On is a gold-standard Functional Medicine test that uses advanced qPCR technology and is acutely sensitive to parasites, bacteria and fungi. The test measures the quantity of an organism’s DNA, providing a more comprehensive pathogen picture. The addition of key intestinal health markers like Occult blood and Zonulin (to assess intestinal permeability, or ‘leaky gut’ risk) provide added reassurance. An excellent first-step on your journey to better health. Feel reassured knowing your purchase includes expert interpretation by a certified practitioner.
Adults and children over 2 years old.
Gut health is a crucial contributor to overall health and GI-Mapping can be beneficial to anyone struggling with chronic symptoms. It can be particularly beneficial if you have:
Analyses 82 markers of gastrointestinal health and microbiota to uncover imbalances contributing to digestive issues, chronic symptoms and disease.
Pathogens: Detects bacterial, viral, and parasitic pathogens like cryptosporidium, epstein-barr Virus and Giardia.
Keystone Bacteria: Assesses beneficial bacteria like Bifidobacterium spp. and Faecalibacterium prausnitzii to understand gut health and balance.
Overgrowth Bacteria: Identifies overgrowth bacteria like morganella & Staphylococcus, linked to gut imbalance and chronic symptoms
Inflammatory & Autoimmune-Related Bacteria: Evaluates bacteria associated with inflammatory and autoimmune conditions like Citrobacter and Escherichia.
Fungi/Yeast: Measures fungal overgrowth like Candida and microsporidia linked to systemic and digestive symptoms.
Intestinal Health Markers: Analyzes digestion, occult blood, inflammation, and immune response to assess gut function.
Parasites and Worms: Detects protozoa like Blastocystis hominis and Ancylostoma duodenale causing gut and systemic issues.
H.pylori and Antibiotic resistance: Tests for H. pylori and its virulence factors linked to gastrointestinal diseases like ulcers – identifies presence of antibiotic resistant genes.
Additional Insights
Evaluates microbiome diversity, detoxification, and oxidative stress markers alongside Zonulin for insight into risk of intestinal permeability (‘leaky gut’).
Read the full instructions provided in your test kit carefully to ensure your sample can be effectively analysed.
You should:
You shouldn’t:
Be aware that:
You’ll need to take and ship your sample on a Monday or Tuesday to allow for analysis in a timely manner.
Certain medications and supplements can impact the test’s accuracy. Please contact us with any queries.
Multiple swabs collected from a single stool sample.
You’ll be invited to join our online portal, Practice Better, where you can receive secure communication from us and manage appointment bookings. Once your results are in we’ll share them with you via the portal and invite you to book your pre-purchased results consultation with a certified practitioner.
Your safety is our priority, and tests, including biomarkers which require clinical review, are only available with interpretation from a certified practitioner.
See our Privacy Policy for information about how your data will be processed by The Forbes Clinic and our third party testing suppliers.

Turnaround times vary depending on the test. We aim to process and submit your order to our provider within 2 working days. Test kits are promptly dispatched, and most samples can be collected and returned as soon as you're ready. Some tests may have specific requirements, such as timing around menstruation or return days. These details can be found under "How do I prepare for the test?" and in your kit. Estimated turnaround times refer to how long it takes to analyse your sample once it’s received at the laboratory.
All at-home test kits include clear instructions for sample collection and return, along with necessary packaging. Some tests require you to return the sample on specific days or immediately after collection. Most kits include pre-paid return labels, but some may require you to arrange a prepaid courier collection. Review the instructions carefully before collecting your sample and refer to the contact details in your kit for any questions.
Your kit will come with full instructions and some include video guides. We can support with queries and we encourage you to contact us using the link below before collecting your sample to ensure it can be effectively analysed.
We offer functional testing with and without practitioner interpretation. You can filter tests by consultation on the Functional Testing page. Certain tests, especially those involving clinically significant biomarkers, are only available with interpretation, and some require interpretation by an Integrative Medicine Doctor. We’ll ensure you’re seen by the right practitioner when your results are in. You can purchase a consultation later if you choose standalone testing, but we offer preferential rates for booking upfront.
We provide functional testing to help you make informed health decisions but do not offer medical advice, diagnosis, or treatment. Results are interpreted through a nutritional, lifestyle, and functional medicine perspective, and it is your responsibility to seek further evaluation, diagnosis or treatment from your primary healthcare provider.
Your digital results report will include indicators of how your specific results differ or align with ‘optimal’ ranges in functional medicine. Some reports include an element of written interpretation. If you’ve purchased a consultation we’ll explain your results and interpret them from a nutritional, lifestyle and functional medicine perspective. We may offer suggestions about how Integrative or Functional Medicine can help and can refer you for full consultation or Integrative Health Assessment with a relevant practitioner if desired. If your test includes a clinically significant biomarker and your result is abnormal, we’ll direct you to consult your primary healthcare provider. If you haven’t purchased a consultation and you’re concerned about your results, you’ll be able to opt-in at this stage.
All third party testing providers are GDPR compliant and adhere strictly to regulatory and industry standards for processing sensitive health data in line with their own Privacy Policies (available on the product page). Results are shared with The Forbes Clinic via each provider's secure online portal and with you via our secure online portal, Practice Better. The Forbes Clinic handles your personal data with care and sensitivity in line with GDPR and according to the terms laid out in our Privacy Policy. Please refer to the privacy policy for more information about exercising your rights under GDPR.
By purchasing testing you acknowledge you have read, understood and agree to our Terms and Conditions


