Gut Microbiome Testing (Viome, ZOE, Biomesight) — Diagnostics & Biomarker Testing
Metagenomic sequencing of gut bacteria to personalize dietary recommendations, identify dysbiosis, and assess functional microbiome output including butyrate production.
Overview
Gut microbiome testing uses shotgun metagenomics (Viome, Biomesight) or 16S rRNA sequencing (Thryve, Ombre) of stool samples to characterize bacterial, fungal, viral, and archaeal populations in the gut. The ZOE program (UK, Tim Spector) conducted the PREDICT studies (n=1,100+ participants) demonstrating that postprandial glucose and lipid responses to identical meals vary enormously between individuals based on gut microbiome composition, insulin sensitivity, and genetics. Viome's platform uses metatranscriptomics (measuring active gene expression, not just presence of bacteria) to generate food and supplement recommendations. Key functional outputs assessed include butyrate-producing bacteria (Faecalibacterium prausnitzii, Roseburia intestinalis), Akkermansia muciniphila (gut barrier integrity), H2S producers (inflammatory), and metabolites like TMAO (cardiovascular risk marker). Microbiome testing is valuable but current clinical applications remain limited by high interindividual variability, test-retest reliability concerns, and evolving reference databases.
Indications
- Personalized dietary optimization based on microbiome composition
- Dysbiosis identification in IBS, IBD, and metabolic disease
- Probiotic and prebiotic selection
- TMAO and cardiovascular risk assessment
- Gut-brain axis assessment in mood and cognitive disorders
Mechanism of Action
Viome's RNA-based sequencing captures which microbial genes are actively expressed, not just which organisms are present — identifying functional output like butyrate synthesis, vitamin production, and inflammatory metabolite generation
Dosing
| Compound | Dose | Frequency | Notes |
|---|---|---|---|
| Microbiome Test (Viome) | Single stool collection | Every 6-12 months or after major dietary/antibiotic changes | Viome Full Body Intelligence: ~$299; includes gut + oral microbiome + transcriptomics-based food recommendations |
Evidence Grade
GRADE B
Safety & Contraindications
- Non-invasive — stool collection only; extremely safe
- Test-retest reliability varies; microbiome composition changes with diet, antibiotics, illness
- Recommendations may conflict with established dietary guidelines — exercise clinical judgment
- Privacy concern: genetic and microbiome data shared with commercial entities
- Results should be interpreted in context of symptoms, not as standalone diagnosis