Blue Horizon Medicals Gut health

Gut Thyroid Function Test

A stool test measuring 58 markers across gut bacteria, archaea, fungi and parasites, framed by the provider around gut-thyroid research; suited to those wanting an in-depth microbiome profile with a thyroid-related angle.

  • At-home test
  • Doctor reviewed
Sample
Stool
Collection
At-home stool sample by post
Results in
28 days
Biomarkers
58
Doctor reviewed
Yes
Tests for
  • Akkermansia muciniphila
  • Bacteroides fragilis
  • Bacteroides thetaiotaomicron
  • Bifidobacterium bifidum
  • Bifidobacterium infantis
  • Bifidobacterium longum
  • Bilophila wadsworthia
  • Blastocystis hominis
  • Candida albicans
  • Candida glabrata
  • Candida krusei
  • Candida tropicalis
  • +27 more

Test specifications

Provider
Blue Horizon Medicals
Sample type
stool
Collection method
at-home stool sample by post
Turnaround time
28 days
Biomarkers tested
58
At-home test
Yes
Doctor reviewed
Yes
Gender focus
Both

What's tested

39 biomarkers as listed by Blue Horizon Medicals, of 58 in total.

  • Akkermansia muciniphila
  • Bacteroides fragilis
  • Bacteroides thetaiotaomicron
  • Bifidobacterium bifidum
  • Bifidobacterium infantis
  • Bifidobacterium longum
  • Bilophila wadsworthia
  • Blastocystis hominis
  • Candida albicans
  • Candida glabrata
  • Candida krusei
  • Candida tropicalis
  • Citrobacter freundii
  • Clostridium hylemonae
  • Clostridium perfringens
  • Clostridium scindens
  • Cryptosporidium spp
  • Desulfovibrio spp
  • Dientamoeba fragilis
  • Entamoeba histolytica
  • Enterobacteriaceae
  • Escherichia coli
  • Eubacterium rectale
  • Faecalibacterium prausnitzii
  • Fusobacterium nucleatum
  • Giardia lamblia
  • Hafnia alvei
  • Helicobacter pylori
  • Klebsiella pneumoniae
  • Lachnospiraceae
  • Lactobacillus acidophilus
  • Lactobacillus plantarum
  • Lactobacillus reuteri
  • Lactobacillus rhamnosus
  • Methanobrevibacter smithii
  • Morganella morganii
  • Prevotella copri
  • Roseburia intestinalis
  • Ruminococcus gnavus

About this test

This is a stool-based test that reports on 58 individual markers, covering gut bacteria, archaea, pathogenic organisms, fungi and parasites. The provider frames the panel around research linking gut microbiome imbalances with thyroid function, and structures the results around areas such as T4 to T3 conversion, iodine and selenium metabolism, and gut permeability, alongside screens for Candida species and parasites.

With 58 markers, this sits at the very top of the gut health tests we track for biomarker count, which is reflected in a maximum clinical depth score. We do not have directly comparable gut-thyroid tests to weigh the £295.15 price against, so the value score reflects the price alone rather than a benchmarked comparison.

Documentation is good: the listing names many of the 58 markers and states the collection method and a 28-day turnaround, although it does not describe what the finished report looks like. Results and follow-up scores reasonably because a doctor reviews the results, while collection convenience is middling given the longer wait for a postal stool sample.

Who is it for?

This suits people who want the most detailed gut microbiome breakdown we track, structured specifically around markers the provider links to thyroid-related pathways, and who are prepared to wait around 28 days for results reviewed by a doctor.

We do not track any directly comparable gut-thyroid tests, so we cannot point you to a cheaper or more limited alternative within this category.

How it works

You collect a stool sample at home and send it to the lab by post. The lab analyses it for 58 markers covering bacteria, archaea, fungi, parasites and pathogenic organisms, structured around a set of gut-thyroid related pathways. Results are reviewed by a doctor, with a turnaround of around 28 days.

Pros & cons

Pros

  • Reports on 58 markers, the most of any gut health test we track
  • Covers bacteria, archaea, fungi, parasites and pathogenic organisms in one stool sample
  • Many of the specific markers are named in the listing
  • Every result is reviewed by a doctor before release

Cons

  • Turnaround of around 28 days is among the longer waits in this category
  • No comparable gut-thyroid tests tracked yet to check whether £295.15 is good value
  • Provider does not describe what the finished report looks like

Our editorial score

Compare Health Test Score Most biomarkers of any gut health test we track
Editorial confidence: 10.0/10

This stool test analyses 58 markers spanning gut bacteria, archaea, fungi and parasites, giving it the most biomarkers of any gut health test we track. It costs £295.15, takes around 28 days to turn around, and results are reviewed by a doctor. There are no directly comparable gut-thyroid tests in our database, so the price cannot be benchmarked against similar products.

Score breakdown

  • Clarity and documentation 8.0/10

    The listing publishes a detailed description, some of the biomarkers by name, a stated turnaround, clear collection options, the sample type; it does not state what the report looks like.

  • Clinical depth 10.0/10

    58 biomarkers, placing it in the 100th percentile of gut health tests we track.

  • Collection convenience 7.0/10

    A stool sample you take at home, no needle; results in around 28 days, slower than similar tests.

  • Results and follow-up 7.0/10

    Results are reviewed by a doctor; the provider does not describe the report format.

  • Trust signals 7.5/10

    Trustpilot 4.2 from 395 reviews; accredited lab (UKAS ISO 15189 partner labs); trading 17+ years.

  • Value for money 6.0/10

    £295.15; no comparable tests to benchmark against yet.

Calculated 13 September 2026 from the facts we hold about this test and provider, using our published scoring formula. Scores are not hand-edited.

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