Functional Lab Testing
SIBO 3-Hour Breath Test
Genova Diagnostics · Fasting required · Results in about 10 days
A non-invasive breath test measuring hydrogen and methane after lactulose to evaluate small intestinal bacterial overgrowth and intestinal methanogen overgrowth. It includes pre-dose and timed post-dose hydrogen and methane readings through three hours.
WHO IT’S FOR
Is a SIBO breath test right for you?
If any of the signs below sound familiar, a breath test may help uncover whether bacterial overgrowth in the small intestine is behind your symptoms.
Symptoms
- Frequent bloating or abdominal distension
- Excess gas or belching
- Abdominal pain or cramping
- Diarrhea, constipation, or both
- Nausea or feeling full quickly after meals
- DyspepsiaÂ
Related Conditions
- Irritable bowel syndrome (IBS)
- Celiac disease or inflammatory bowel disease
- Hypothyroidism or slow gut motility
- Diabetes affecting digestion
- Low stomach acid or long-term acid-reducer use
- FibromyalgiaÂ
- RosaceaÂ
- Parkinson’s DiseaseÂ
- ObesityÂ
Situations
- Ongoing gut issues without a clear diagnosis
- Symptoms that return after treatment
- Prior abdominal surgery
- Unexplained nutrient deficiencies or weight changes
- Food sensitivities that keep growing
Not sure? Book a Discovery Call about whether testing fits your situation.
Biomarker Summary
When it comes to gastrointestinal symptoms, studies have shown that a large percentage of Irritable Bowel Syndrome (IBS) is actually Small Intestinal Bacterial Overgrowth (SIBO).
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SIBO is a common clinical condition characterized by excessive bacterial development in the small intestine. This non-invasive breath test captures exhaled hydrogen and methane, to provide practitioners with the insight to better differentiate and diagnose SIBO. Tests the following biomarkers:
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Hydrogen, Pre-Dose Glucose
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Hydrogen, 15M Post-Dose Glucose
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Hydrogen, 30M Post-Dose Glucose
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Hydrogen, 45M Post-Dose Glucose
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Hydrogen, 1H Post-Dose Glucose
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Hydrogen, 1.25H Post-Dose Glucose
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Hydrogen, 1.5H Post-Dose Glucose
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Hydrogen, 1.75H Post-Dose Glucose
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Hydrogen, 2H Post-Dose Glucose
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Hydrogen Sulfide, Pre-Dose Glucose
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Hydrogen Sulfide, 15M Post-Dose Glucose
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Hydrogen Sulfide, 30M Post-Dose Glucose
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Hydrogen Sulfide, 45M Post-Dose Glucose
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Hydrogen Sulfide, 45M Post-Dose Glucose
15. Hydrogen Sulfide, 1H Post-Dose Glucose
16. Hydrogen Sulfide, 1.25H Post-Dose Glucose
17. Hydrogen Sulfide, 1.5H Post-Dose Glucose
18. Hydrogen Sulfide, 1.75H Post-Dose Glucose
19. Hydrogen Sulfide, 2H Post-Dose Glucose
20. Methane, Pre-Dose Glucose
21. Methane, 15M Post-Dose Glucose
22. Methane, 30M Post-Dose Glucose
23. Methane, 45M Post-Dose Glucose
24. Methane, 1H Post-Dose Glucose
25. Methane, 1.25H Post-Dose Glucose
26. Methane, 1.5H Post-Dose Glucose
27. Methane, 1.75H Post-Dose Glucose
28. Methane, 2H Post-Dose Glucose
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Clear Answers
Identify whether bacterial overgrowth may be behind bloating, gas or discomfort instead of guessing.
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Better Digestion
Addressing the root cause can support calmer, more comfortable digestion after every meal.
The Benefits of a SIBO Breath Test
Understanding what's happening in your gut is the first step toward feeling like yourself again. Here's what testing can help you gain.
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Simple & Non-Invasive
Just breathe into a collection tube — no needles, no scopes and no complicated procedures.
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More Energy
A healthier gut supports nutrient absorption, helping you feel more vibrant day to day.
WHY TEST
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Targeted Care
Results give you and your practitioner a solid basis for a personalized treatment and nutrition plan.
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Peace of Mind
Stop wondering and start acting with confidence, so you can enjoy food and life again.
Why choose Genova Diagnostics' Gut Health Products?
Trusted testing designed to give you and your practitioner clear, reliable insight into your gut health.
Evidence-Based Insight
IBS symptoms can overlap with SIBO. Non-invasive breath testing can help evaluate whether bacterial overgrowth may be contributing.
Consensus-Guided Testing
Genova SIBO profiles follow North American Consensus Guidelines and measure exhaled hydrogen and methane after a lactulose solution.
More Complete Information
The test can evaluate SIBO and intestinal methanogen overgrowth. A third-hour flatline may also point to hydrogen sulfide gas.
State Restictions
Patient can't order this test if they are located in Hawaii.
After Your Test
Next Steps
Test results are only the beginning. Here's how we turn your data into a clear, personal path toward a calmer, healthier gut.
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Interpreting Your Results
We walk through your report together in plain language, connecting the markers to your symptoms, history and lifestyle so you understand what's really going on.
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Testing is one piece of the puzzle. Your results guide nutrition, lifestyle and targeted support within a broader plan built around you.
A Whole-Body Healing Plan
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Ongoing Follow-Up Support
Regular check-ins help us track progress, answer questions as they come up and adjust your plan as your body responds.