SIBO is an overgrowth of bacteria in the small intestine that can cause bloating, gas or diarrhoea. It is diagnosed using a breath test or, less commonly, a culture of small intestinal contents.
A stool sample mainly reflects the colon, so no stool microbiome test can diagnose SIBO. The bacterial overgrowth report in the Advanced test analyses patterns of microorganisms associated with overgrowth. It provides indicative information and cannot confirm or rule out SIBO.