The First True Gut Microbiome Test

See the gut's entire bacterial ecosystem and understand what it means for your health.

Patented science. Next-generation sequencing. AI‑powered analysis.

Kits from £279.00

Shop Tests

As seen in

For clinicians and practitioners

The clinical evidence, and how practice accounts work.

See the science →Register your interest →

Two tests, one sample

Which one is you?

Both read your entire gut ecosystem in the same laboratory. The difference is how far beyond the gut the report looks.

Gut first

CGI · Core Gut Insights

For gut symptoms

£279.00free shipping both ways

Built for: bloating, irregularity, IBS, IBD, SIBO — anything that starts in the gut.

Your whole bacterial ecosystem, read to the strain level
What is likely driving the symptom, and a plan aimed at it
Food, supplement and lifestyle direction

Choose CGI See a sample report

Testing before and after? GutID CGI - Twin Pack UK · £429.00

Most complete

CMA · Complete Microbiome Assessment

For the whole body

£409.00free shipping both ways

Built for: symptoms that reach beyond the gut — mood, energy, skin, weight, immunity — or a clinician who wants the full picture.

Everything in CGI
Plus the systemic axes: gut-brain, gut-immune, gut-metabolism and gut-heart
Nutrient and dietary metabolism, for you or your practitioner

Choose CMA See a sample report

Testing before and after? GutID CMA - Twin Pack UK · £629.00

Not sure which test? Read the side-by-side, or see how GutID fits into a plan with your practitioner.

Compare CGI and CMA

The five Gut Axes we report on

What happens in your gutgoes beyond digestion

These are the questions people bring us. Your report is organized around the systems behind them — Gut-Gastrointestinal, Gut-Brain, Gut-Heart, Gut-Metabolism and Gut-Immune.

Why am I bloated even when I eat well?Gut-gastrointestinal axis Why does my mood track with my stomach?Gut-brain axis Why do I react to foods I used to be fine with?Gut-immune axis Why has my weight stopped responding?Gut-metabolism axis Is my gut affecting my heart health?Gut-heart axis Why does my skin flare for no reason I can see?Gut-immune axis What is actually living in my gut?The whole picture Why am I bloated even when I eat well?Gut-gastrointestinal axis Why does my mood track with my stomach?Gut-brain axis Why do I react to foods I used to be fine with?Gut-immune axis Why has my weight stopped responding?Gut-metabolism axis Is my gut affecting my heart health?Gut-heart axis Why does my skin flare for no reason I can see?Gut-immune axis What is actually living in my gut?The whole picture

Why do I feel worse on a healthy diet?Gut-gastrointestinal axis Which foods actually suit me?What to act on Why am I tired when my bloods are normal?Gut-metabolism axis Is my gut behind my recurring symptoms?Gut-immune axis What should I take, and what is a waste?What to act on Has anything shifted since last time?Retesting

Learn more about how GutID could help →

Load video: How GutID works in four steps: order online, activate and collect your sample at home, post it back, and get your results

How it works

Order your kit, collect at home, post it back. Titan-1 analysis follows, and your results arrive with recommendations you and your clinician can act on.

Shop Tests

In their words

What people are saying

Customers and the practitioners they work with, on what the report changed.

For years, I struggled with health issues, including persistent acne, only to be told that all standard tests were normal. But I knew something wasn't right. It wasn't until my physician recommended GutID that I finally found answers. GutID has been absolutely instrumental in my health journey, providing insights I couldn't find elsewhere.

Lindsey C.

GutID revealed my FODMAP sensitivity and probiotic needs, giving my clinician the insight to provide precise advice that keeps my gut feeling great.

Penelope K.

GutID helped my nutritionist find the right probiotics and supplements to ease my years of stomach issues.

Denise S.

GutID helped me realize how important gut health is - now I can enjoy the foods I love while avoiding what irritates my gut.

Michael G.

The practical details

If a kit arrives damaged, or a sample fails through an error on our side, we replace it free of charge.

At-home test

One sample, taken at home in about five minutes, then posted back for analysis. Shipping is free both ways.

When your results arrive

After the lab receives your sample and it passes quality checks, results take 3–4 weeks in the US and 4–5 weeks in the UK and Canada.

CLIA-certified, CAP-accredited

Processed in a CLIA-certified, CAP-accredited laboratory in the United States, on patented Titan-1 Technology.

Help is available

Individual clients can choose an optional £61.00 report consultation. Clinicians receive interpretation support at no charge.

GutID provides wellness and educational insights and is not a diagnostic test.

What you actually find out

The whole ecosystem, not a sample of it

A partial picture can send you in the wrong direction. GutID identifies the organisms that usually go uncounted, so what you act on reflects what is actually in your gut.

It's not just about digestion

Your gut bacteria are linked to far more than how your stomach feels. GutID reports across the systems they touch, not the digestive one alone.

Findings you can act on

Your report comes with specific food, supplement and lifestyle direction — to act on yourself, or to take to your clinician.

Titan-1 Technology

How Titan-1 sees more of your gut

Most gut tests read a short snippet of bacterial DNA and work the rest out by inference. Titan-1 reads a long, unbroken stretch — and that one difference runs through everything below.

1 / 3

We open the tough ones, gently

Some gut bacteria have tough outer coats, and the usual methods struggle to break them open — what a test cannot open, it cannot see, so those bacteria quietly go missing. But force it, and you damage the DNA of the more delicate bacteria instead, and those get read badly. We make our own method that opens the tough ones without harming the rest, so both get counted properly.

2 / 3

We read it in one piece

Most tests read short fragments of DNA and piece the answer together, a bit like naming a book from a few scattered sentences. Our patented approach reads one long, unbroken stretch instead — enough to tell very similar bacteria apart. That only works because the DNA arrives undamaged.

3 / 3

We can spot the unfamiliar ones

Most tests name bacteria by matching them to a fixed list, so anything missing from that list gets overlooked or labeled wrongly. Our own AI-driven software works out identity from the DNA itself, so unusual and less-studied bacteria still show up.

See the science in full →

Side by side

How this compares to other gut tests

Most gut tests read DNA in short fragments, then reassemble the picture afterwards — and every reassembly is a chance to name the wrong organism. Shotgun approaches also spend much of the read on human DNA rather than bacteria. Targeted ones only find what they were already told to look for.

Titan-1 reads one long, unbroken stretch instead. That is what accuracy, completeness and detail come down to here: naming the organism correctly, missing fewer of them, and telling near-identical ones apart.

Swipe or scroll to compare all methods. Titan-1 is the highlighted column.

How this compares to other gut tests
	qPCR	16S-only	Shotgun metagenomics	Titan-1
What it reads	Only the bacteria you already thought to look for	One short stretch of one gene	Everything in the sample, in short fragments	One long, unbroken stretch, read end to end
How precisely it names them	Only what is on the list	Usually the family, not the exact bacterium	The family, sometimes the species; almost never the strain	Down to the species and the strain
Unfamiliar bacteria	Missed — they are not on the list	Often labeled wrongly	Depends on the reference list	Worked out from the DNA itself
How much of each there is	Not comparable between targets	Skewed	Skewed by fragment size	Kept accurate

Rows describe the general characteristics of each method, not any specific product. Comparison of sequencing approaches informed in part by Gehrig et al., Microbial Genomics, 2022.

Research and technology partners

For clinicians

See and manage the microbiome

Most microbiome testing sorts bacteria into good and bad. That runs out quickly in practice, because what matters is how the community behaves as a whole — its diversity, its balance, and how well it recovers. GutID reports the gut microbiome that way, and we help your team learn to work with it that way.

Beyond good and bad bacteria

Diversity, balance and how well a gut community recovers tell you more than a list of organisms sorted into helpful and harmful.

A method you can follow

A written, six-step way of reading a report, so it is repeatable across your team and across a patient's follow-up.

Training and clinical support

A certified practitioner programme, and our clinical team on hand when a case is complicated.

Abstract render of densely packed bacterial cells resolving into individually distinguishable organisms

The GutID Clinician Guide

The Ecosystem Approach
A six-step interpretation sequence
Clinically authored, fully referenced

Get the Clinician Guide Schedule a call to learn more →

Ready to see your own?

Order a kit, or compare the two tests first.

Shop the tests Compare CGI and CMA

Latest stories

Gut health, the science behind the test, and how clinicians are using it in practice.

View all

Sep 17, 2026

At-Home Parasite Testing: What Stool PCR Can and Can't Find

A negative stool PCR doesn't rule out every parasite. Learn what at-home parasite tests actually measure, their limitations, and when further testing is needed.

Sep 16, 2026

How Often Should You Retest Your Microbiome?

There's no universal retesting interval for microbiome tests. Learn when retesting is most informative and what to look for when comparing results over time.

Sep 10, 2026

SIBO Breath Test vs. Stool Testing: What's the Difference?

SIBO breath tests and stool microbiome tests answer different questions. Learn what each measures, their limitations, and when to use both.