Stool-based sequencing — 16S rRNA or shotgun metagenomics — profiling bacterial composition and usually reported back as a diversity score or a list of “good” and “bad” bacteria. The underlying science is real: the gut microbiome genuinely influences metabolism, immune function and possibly mood through the gut-brain axis, and it is an active, legitimate research field. The commercial test is a different object from the research.
An international consensus statement on microbiome testing in clinical practice, published in The Lancet Gastroenterology & Hepatology in 2024, concluded that evidence supporting the clinical usefulness of microbiome diagnostics is scarce, and that commercial providers offer direct-to-consumer tests without regulatory approval or consensus on their value — risking wasted patient resources. A related 2025 analytical study found major discrepancies between different commercial providers testing the same stool sample, with inter-provider variability on the same scale as the biological variability between different people. No stool microbiome test can currently diagnose depression, anxiety or neurodevelopmental disorders in clinical practice, and there are no regulatory-approved clinical microbiome diagnostics as of this review.
International consensus statement on microbiome testing in clinical practice. Lancet Gastroenterol Hepatol. 2024. PubMed: PMID 39647502
Singapore guidance
Not covered in the current review
Singapore’s national screening committee has not reviewed this test in the current volume of its report, which covers nine conditions. That is not a verdict either way.
Source: Screening Test Review Committee report 2026, Volume 1 (Academy of Medicine Singapore and Ministry of Health, February 2026). The full national list · How this is used.
What you would actually pay
- Healthier SG
- Not subsidised
- MediSave
- Not among the screenings named for outpatient claims
Source: Healthier SG Screening (HealthHub) and MediSave outpatient care (Ministry of Health). Absence from either list is not a statement that the test is discouraged — only that no subsidy or claim applies. Gross prices compared.
What it costs when it is wrong
- Basis
- No published harm criterion found
- Severity
- Not documented
Not covered in the current volume of the committee’s report, so no harm criterion was found either way.
An empty finding, not a clean bill of health: this means nothing documented was found for this test. It is not a claim that the test is safe.
Screening harm is not only a laboratory question: the committee’s own criteria advise against a test when “the screening test, or follow-up tests arising from a positive screen, are associated with significant medical risks”. Sources on overdiagnosis → · How this is graded.
FAQ
Is the Gut Microbiome Testing worth doing in Singapore?
Gut Microbiome Testing carries a weak evidence grade for screening adults without symptoms. It typically costs S$300–600 in Singapore. It is most appropriate for not currently recommended for any general-population clinical decision-making. There is no routine interval: not a validated clinical test.
Weighing this against something else? Compare it with two other tests → · Price it inside a panel →