Hydrogen Breath Testing for SIBO Diagnosis
Small intestinal bacterial overgrowth (SIBO) is diagnosed through hydrogen breath testing—a non-invasive procedure measuring gases your breath produces. This simple test identifies whether bacteria are fermenting carbohydrates in your small intestine.
Our testing protocol includes hydrogen, methane, and CO2 measurement for comprehensive SIBO assessment.
Request an AppointmentHow Breath Testing Works
- Consume test sugar solution (non-absorbable carbohydrate)
- Exhale into collection bags every 20 minutes for 3 hours
- Seven total breath samples collected
- Elevated hydrogen or methane indicates bacterial fermentation
- Timing of elevation reveals SIBO pattern
- Results guide treatment strategy
Why We Test for Hydrogen AND Methane
Different bacterial types produce different gases. Hydrogen-dominant SIBO requires different treatment than methane-dominant. Testing both ensures accurate diagnosis and targeted treatment.
Conditions Indicated by Breath Testing
- SIBO (small intestinal bacterial overgrowth)
- Fructose malabsorption
- Lactose intolerance
- Carbohydrate malabsorption
- Delayed gastric emptying
Preparation
- Restricted diet 2-3 days before
- Avoid antibiotics for 2 weeks prior
- Fasting 12 hours before test
- No vigorous exercise 1 hour before
- No smoking or coffee morning of test
Treatment After Diagnosis
If SIBO is confirmed, we implement targeted treatment including:
- Specific antimicrobial protocols (herbal or pharmaceutical)
- Low-FODMAP or elemental diet
- Nutritional support
- Motility enhancement
- Follow-up breath testing to confirm eradication
Schedule Your Breath Test
Request an AppointmentFrequently Asked Questions
Is the breath test accurate?
Hydrogen breath testing is the gold-standard diagnostic test for SIBO when performed correctly. Accuracy depends on proper preparation, diet restriction, and testing protocol. We follow strict guidelines to ensure accuracy.
What if my test is negative but I have SIBO symptoms?
False negatives can occur if you’re taking antibiotics or have methane-only SIBO that our standard testing doesn’t capture. We’ll discuss additional testing or clinical trial options if SIBO remains suspected.
Can I eat before the test?
No. You must fast 12 hours before. Food would interfere with test results by providing substrate for bacteria already in your digestive tract unrelated to actual SIBO.
How long does the test take?
Approximately 3 hours. You’ll collect seven breath samples over this period but can sit comfortably in our office or leave between samples.
When will I get results?
Results are analyzed and reviewed by your physician within 3-5 business days. We schedule a follow-up appointment to discuss findings and treatment recommendations if SIBO is present.
What’s the treatment for SIBO?
Treatment depends on SIBO type and severity. Options include antimicrobial herbs or antibiotics combined with specific diets (low-FODMAP or elemental). Most people require 4-8 weeks of treatment, sometimes longer for severe cases.