The SIBO Breath Test Hydrogen & Methane - Fructose by Nutripath detects small intestinal bacterial overgrowth by measuring hydrogen and methane gases produced after ingesting fructose. This test helps identify bacterial fermentation in the small intestine, which may contribute to digestive symptoms. It is a non-invasive breath test that provides useful information for practitioners to understand gut health. Suitable for use in clinical settings, this test supports targeted nutritional and lifestyle interventions.