SIBO Breath Test

A SIBO breath test is a convenient at-home test that measures the gases produced by bacteria in your digestive tract. We guide you through the preparation, testing process, and next steps so your results can be interpreted in the context of your symptoms not just as a number on a report.

What is a SIBO breath test?

A SIBO breath test is a non-invasive test that looks at the gases produced when bacteria ferment a sugar solution you drink during the test.

Normally, the small intestine contains relatively low levels of bacteria. With small intestinal bacterial overgrowth, bacteria may be present higher in the digestive tract than expected. As they ferment the test solution, they produce gases primarily hydrogen and methane, which can be measured through your breath samples.

The test involves collecting breath samples at timed intervals over several hours from the comfort of your home. The pattern of gas production helps determine whether SIBO or related bacterial overgrowth patterns may be contributing to your symptoms.

Hydrogen, methane, and what they tell us

Different gas patterns can be associated with different digestive symptoms:

• Hydrogen-dominant patterns are more commonly associated with diarrhea and faster bowel transit.
• Methane-dominant patterns (now often referred to as intestinal methanogen overgrowth or IMO) are more commonly associated with constipation and slower transit.

Understanding your pattern helps guide a more personalized treatment approach rather than using a one-size-fits-all plan.

How do I prepare for a SIBO breath test?

Preparation is one of the most important parts of getting meaningful results. Food choices, supplements, and medications before testing can influence the outcome.

Before your test, you’ll typically follow a specific preparation diet, fast overnight, and pause certain supplements or medications for a recommended period of time when appropriate. We provide clear instructions based on your individual situation so you know exactly what to do before testing.

Can I complete a SIBO breath test at home?

Yes. SIBO breath testing is designed to be completed from home. We’ll order the test kit and ship it to you.

You’ll drink the provided test solution, collect breath samples at scheduled intervals over a few hours, and return the kit for laboratory analysis. There is no clinic visit required for the testing itself.