Biomarker Reference · pH
Faecal pH (pH) is a clinical biomarker used in microbiome-gut assessment. Stool pH reflects the balance of fermentation (short-chain fatty acid production, which lowers pH) and putrefaction (ammonia and other alkaline metabolites, which raise pH). It is measured in 2 laboratory tests on BiomarkersLabs.com.
Stool pH reflects the balance of fermentation (short-chain fatty acid production, which lowers pH) and putrefaction (ammonia and other alkaline metabolites, which raise pH). Low pH indicates robust carbohydrate fermentation by commensal anaerobes; high pH may reflect reduced fibre fermentation, bacterial overgrowth, or protein maldigestion.
Faecal pH is an indirect marker of colonic fermentation and microbial metabolism. Persistently alkaline stool (pH >7.5) can suggest dysbiosis with reduced saccharolytic fermentation or increased proteolytic activity. Interpretation is exploratory and must be read alongside other microbiome and digestive markers.
Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.
2 tests on BiomarkersLabs.com include this biomarker.
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