Conditions and the GI-MAP Test

How the GI-MAP stool test is used across gut-related concerns — IBS, SIBO, and the gut-brain axis — and where it fits into a work-up.

People and practitioners use the GI-MAP (Gastrointestinal Microbial Assay Plus) to investigate a range of gut-related concerns. These guides explain how a comprehensive stool test fits into each situation — and, importantly, where it does not replace other tests or a clinical diagnosis.

IBS

How the GI-MAP is used to profile the microbiome and help distinguish IBS from IBD.

SIBO

What a stool test can and cannot show — SIBO is diagnosed by breath testing, not stool.

Gut-Brain Axis

How gut microbes communicate with the brain, and how the microbiome is profiled.

Medically reviewed by

Madison Ordway, FDN-P

Functional Diagnostic Nutrition Practitioner specializing in gut health, hormone balance and mineral optimization. Madison uses GI-MAP testing in her work with clients and has been featured in US Insider, Women’s Journal and The Science Times. See press features →

Content reviewed against Diagnostic Solutions Laboratory documentation and peer-reviewed literature. Last reviewed 6 July 2026.

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