Small intestinal bacterial overgrowth (SIBO) occurs when bacteria that normally live in the colon migrate to or proliferate excessively in the small intestine. This leads to abnormal fermentation of carbohydrates, producing hydrogen and/or methane gas and causing symptoms including bloating, gas, diarrhea, constipation, and abdominal pain.
The Hydrogen/Methane Breath Test
The SIBO breath test is a non-invasive, in-office test. After a preparatory diet and overnight fast, you drink a lactulose or glucose solution and breathe into collection tubes at 15–20 minute intervals over 2–3 hours. Elevated hydrogen or methane levels indicate abnormal bacterial fermentation in the small intestine. We also offer breath tests for lactose and fructose intolerance.
SIBO Preparation
To ensure accurate results, patients must follow a specific low-fermentation diet for 24 hours before the test and fast for 12 hours overnight. Certain medications (antibiotics, laxatives, proton pump inhibitors) may need to be held before testing. Detailed preparation instructions will be provided when you schedule.
Treatment
SIBO is typically treated with a course of rifaximin (a gut-specific antibiotic with minimal systemic absorption). Some patients with methane-predominant SIBO require combination antibiotic therapy. Dietary modifications including a low-FODMAP diet may help reduce recurrence. Our gastroenterologists also evaluate for underlying conditions predisposing to SIBO.
Book a SIBO Breath Test in NJ — Call (908) 851-2770 or Schedule Online