Phenome Longevity

Gut Microbiome Test

Clinical-grade gut analysis. At home.

An at-home clinical-grade stool DNA sequencing analysis that maps gut microbiome composition and function, and delivers personalised health insights on digestion, immunity, mood, and metabolism.

Results in
2 to 4 weeks
Sample type
Stool sample
Technology
Shotgun Metagenomic NGS
Order Test →Not sure? Take the quiz
  • 15Report sections · health domains covered
  • 29+Conditions mapped · from IBS to Parkinson’s
Gut Microbiome Test sample collection kit

How it works

From sample to insight, in four simple steps.

Step 01Order your kit

Free delivery in 2 to 3 working days. Discreet packaging.

Step 02Collect at home

A small stool sample using the sterile kit, with step-by-step instructions.

Step 03Lab analysis

Shotgun metagenomic sequencing in our accredited lab. Results in 2 to 4 weeks.

Step 04Report + Consultation

Personalised report in the Phenome app, plus a 1-to-1 consultation session.

Why it mattersGut microbiome testing: why it matters for digestive health.

The gut microbiome is a central regulator of human health, influencing digestion, immune function, metabolism, energy levels, and brain-gut signalling linked to mood and cognitive clarity.

When balanced, these systems function optimally. When disrupted (microbial dysbiosis), measurable imbalances can affect multiple aspects of daily health.

  • 100T+

    Microorganisms

    Hosted in your gut

  • 3M+

    Microbial genes

    vs ~20,000 in human DNA

  • 70%

    Immune system

    Located in the gut

  • 40+

    Disorders

    Linked to gut imbalance

The four core jobsWhat your gut microbiome does

The digestive organs lit inside the human body

01Digestion & Nutrients

Breaks down fibres the body can’t, turning them into short-chain fatty acids, and produces vitamins like K, folate, and B vitamins.

A spread of fresh vegetables, fruit and berries

02Immunity & Defence

Around 70% of immune cells live in the gut. A balanced microbiome trains them to tell friend from threat and keeps inflammation in check.

The interior of a cell, with mitochondria among the organelles

03Hormones & Metabolism

More than 20 hormones originate in the gut, including serotonin, ghrelin, and GLP-1, shaping appetite, mood, and blood-sugar control.

The human body with the line between brain and gut lit

04The Gut-Brain Axis

Gut microbes help produce serotonin and dopamine, so a balanced gut tends to mean clearer mood, better sleep, and steadier energy.

01/ 04

Who it’s for

This test is highly recommended for

Everyday gut health optimisation

  • Improve digestion and energy
  • understand how your gut affects mood
  • get science-backed gut insights and nutrition tips

Those with gut-related symptoms

  • Bloating, IBS, and post-meal discomfort
  • breakouts, eczema, skin inflammation
  • fatigue, brain fog, or low energy
  • frequent illness

Fitness, recovery & performance

  • Optimise diet, supplements, and probiotics
  • enhance recovery and nutrient absorption
  • improve performance through gut health

Long-term preventive health

  • Prevent chronic conditions before they develop
  • family history of metabolic or autoimmune disorders
  • proactive, data-driven health

What are the symptoms and conditionscaused by gut microbiome imbalance?

Microbial dysbiosis can show up in surprising places, across the digestive system, skin, immunity, mood and energy. If any of these feel familiar, testing can help you understand why.

  • IBS & constipation

  • Food intolerances

  • Bloating & indigestion

  • Acne & eczema

  • Fatigue & brain fog

  • Anxiety & mood imbalances

  • Weight fluctuations

  • Low immunity & inflammation

Your report

What is included in your Gut Microbiome Test Report

Your report translates scientific data into clear insights on digestion, immunity, and energy. Each section expands for more detail.

  • Your gut microbiome diversity, stability, and health score, with a visual comparison to optimal reference ranges.

  • A breakdown of the dominant bacterial species in your gut, showing which are beneficial and which may contribute to imbalance.

  • Your gut type based on dominant bacterial families, revealing how your microbiome influences metabolism and dietary response.

  • A numerical measure of imbalance, showing how far your microbiome has shifted from equilibrium and what it means.

  • A full list of bacterial species found in your sample with their known roles in digestion, immunity, and metabolism.

  • Your microbiome’s ability to process carbohydrates, fats, and proteins and produce short-chain fatty acids that nourish the gut lining.

  • How your bacteria contribute to vitamin production (B12, K, folate) and how efficiently they process key nutrients.

  • How your gut microbes interact with your immune system to regulate inflammation and protect against pathogens.

  • How the state of your gut affects skin health, and the link between imbalance and conditions like acne or eczema.

  • Bacteria linked to inflammation control and immune overactivity, helping identify early signs of imbalance.

  • Microbial activity related to gut-barrier integrity and permeability that can influence systemic inflammation.

  • Microbial markers associated with IBS, showing patterns linked to discomfort, bloating, and irregular digestion.

  • Bacterial profiles associated with overgrowth in the small intestine that may cause bloating, gas, and absorption issues.

  • Microbial pathways involved in gluten metabolism, identifying patterns that may indicate sensitivity or intolerance.

  • Bacteria influencing metabolism, energy extraction, and fat regulation, to understand how your gut may affect weight control.

  • Targeted lifestyle and nutrition guidance based on your profile, with practical steps to restore balance and maintain gut health.

What you get

Your personalised gut health report.

Gut Microbiome Test results in the Phenome app, on a phone

Your Gut Microbiome Report

  • Full results in the Phenome appAll 16 report sections visualised clearly, with plain-language explanations for every finding.
  • Personalised diet & supplement guidanceA 1-to-1 session with a Phenome nutritionist to build a plan around your microbiome.
  • Clinically reviewed PDF report.Reviewed by our clinical team, ready to share with your GP, specialist, or family.
  • Complete data privacyProcessed under GDPR, stored on encrypted servers, and never shared with any third party.

Your gut is the foundation of your health.

Test your gut health at home with lab-grade analysis and get fast, accurate results in 2 to 4 weeks.

Order your test kit · $265.00 →
  • Free shippingDelivered in 2 to 3 working days
  • 16 health domainsMapped from a single sample
  • 1-to-1 consultationPhenome nutritionist included
  • GDPR + encryptedYour data, always under your control

Meet your gut bacteria

The species that matter. Explained.

Some of the species your report looks at, and what they do for digestion, immunity, mood, and metabolism.

  • Bifidobacterium longum

    Supports digestion, reduces inflammation, and helps maintain gut barrier integrity.

  • Lactobacillus rhamnosus

    Assists in breaking down carbohydrates and supports healthy intestinal flora.

  • Akkermansia muciniphila

    Strengthens the gut lining and supports metabolic balance.

  • Faecalibacterium prausnitzii

    Produces butyrate, an anti-inflammatory compound essential for colon health.

  • Roseburia intestinalis

    Helps generate short-chain fatty acids and supports energy metabolism.

Reviews

What our customers say.

★★★★★

  • ★★★★★
    “I’d read so much about gut health without really understanding it. Seeing the report made the subject feel more approachable.”

    Lucy H.Gut Microbiome Test

  • ★★★★★
    “The nutrition session was particularly useful. We discussed ideas that felt realistic for the way I actually eat.”

    AnonymousGut Microbiome Test

  • ★★★★★
    “I ended up spending longer than expected exploring the bacteria dictionary. The extra explanations were a nice touch.”

    Ella R.Gut Microbiome Test

The science

Grounded in gut microbiome research.

A gloved hand holding a sterile collection swab

Our standards

Our analysis is built on peer-reviewed evidence across digestion, immunity, and systemic health, reviewed by a clinician, with methods and references shipped in every report.

  • Peer-reviewed methodologyCell Press, Nature
  • Accredited laboratoryISO 17025 medical testing
  • Clinician-reviewed reports1-to-1 nutritionist included

References

Peer reviewed papers by Phenome’s scientific team and collaborators. Each opens the original paper.

Frequently asked questions.

What does the Gut Microbiome Test analyse?

It analyses the composition and balance of your gut microbiome, identifying key bacterial species, diversity levels, and patterns associated with digestion, immunity, metabolism, and overall wellbeing.

Why is gut health important?

The gut microbiome influences nutrient absorption, hormone regulation, immune function, and mood. Understanding its composition enables targeted dietary and lifestyle changes that support long-term health.

How is the sample collected?

You collect a small stool sample at home using the provided sterile kit, with step-by-step instructions for safe, hygienic collection.

What insights will I receive in the report?

A detailed overview of bacterial diversity, abundance, and balance, with findings on digestion, inflammation, and microbial composition, plus personalised recommendations.

How accurate is the analysis?

The test uses shotgun metagenomic sequencing for high-depth, high-precision analysis, identifying bacteria at both genus and species level.

Who should take this test?

Adults 18 and over wanting to understand their gut health, particularly those experiencing digestive discomfort, bloating, low energy, or irregular bowel habits.

When should I take and send my sample?

Collect between Monday and Thursday (Royal Mail days) and return the same day using the prepaid envelope, ideally before midday. Avoid public holidays.

Where can I see my results?

Results are uploaded automatically to your secure profile in the app, created with the email you provided at checkout. You can download the report as a PDF anytime.

Didn’t find your answer?

Don’t hesitate to contact us. Our clinical team will get back to you as soon as possible.

Order your test kit · $265.00 →

Related tests & services.