Intestinal Breath Testing for SIBO in Los Angeles, CA
Small intestinal bacterial overgrowth (SIBO) and carbohydrate malabsorption are commonly diagnosed with an intestinal breath test, a simple, non-invasive test that measures gases produced by bacteria in your gut. At LA Integrative Gastroenterology & Nutrition, our breath testing measures hydrogen and methane to identify whether bacteria are fermenting carbohydrates in your small intestine, giving our physicians the information they need to create a targeted treatment plan.
Request an AppointmentHow Breath Testing Works
- You drink a test sugar solution, such as lactulose or glucose.
- You exhale into collection tubes or bags at set intervals, typically every 20 minutes for about 3 hours.
- The samples are analyzed for hydrogen and methane.
- Elevated gas levels indicate bacterial fermentation, and the timing of the rise helps identify the pattern of overgrowth.
- Your results guide a targeted treatment strategy.
Why We Measure Both Hydrogen and Methane
Different microorganisms produce different gases. Hydrogen-predominant overgrowth is often associated with diarrhea, while methane-predominant overgrowth is often linked to constipation. Because these patterns require different treatment, measuring both gases supports an accurate diagnosis and a more effective plan.
Conditions Breath Testing Can Help Identify
- Small intestinal bacterial overgrowth (SIBO)
- Lactose intolerance
- Fructose malabsorption and other carbohydrate malabsorption
- Contributors to bloating and gas, abdominal pain, and IBS-type symptoms
How to Prepare
Accurate results depend on proper preparation. Typical instructions include:
- A restricted preparation diet for 1 to 2 days before the test
- Avoiding antibiotics for several weeks beforehand, and discussing probiotics, laxatives, and other medications with our office
- Fasting for about 12 hours before the test
- No smoking, vigorous exercise, or coffee on the morning of the test
Follow the specific instructions provided with your kit or by our office.
At-Home SIBO Breath Test Kits
Breath testing can be completed conveniently at home. Patients can order SIBO breath test kits through our website and return samples for analysis. Correct interpretation requires experience, and our physicians have extensive expertise reading these tests.
Treatment After Diagnosis
If SIBO is confirmed, treatment may include targeted antibiotic or herbal antimicrobial therapy, a low-FODMAP diet or the elemental diet, nutritional support with nutraceutical supplements, motility support to help prevent relapse, and follow-up testing when appropriate. Learn more about our technical services or see our breath testing fees.
Intestinal Breath Test FAQs
Is the breath test accurate?
Breath testing is the most widely used non-invasive test for SIBO. Accuracy depends on careful preparation and experienced interpretation, which is why following the instructions closely is important.
What if my test is negative but I still have symptoms?
A negative result can occur for several reasons, including recent antibiotic use or other types of overgrowth. Your doctor may recommend additional testing or evaluation for other causes.
Can I eat before the test?
No. You will need to fast for about 12 hours before the test and follow a preparation diet beforehand, because food can affect the results.
How long does the test take?
The test usually takes about 3 hours, with breath samples collected at regular intervals.
Can I do the test at home?
Yes. You can order a SIBO breath test kit and complete the collection at home.
When will I get my results?
Results are typically reviewed by your physician within several business days, followed by a discussion of findings and treatment recommendations.
How is SIBO treated?
Treatment usually combines antimicrobial therapy with a targeted diet and nutritional support. Many patients need several weeks of treatment, and some need longer.
Schedule Your SIBO Breath Test in Los Angeles, CA
If you are dealing with bloating, gas, or irregular bowel habits, a breath test may provide answers. Call LA Integrative Gastroenterology & Nutrition at (310) 289-8000 to get started.