SIBO/IBS Test
Lab-grade testing from the comfort of home. We ship a sterile self-collection kit with prepaid return shipping. Your sample is analyzed by a CLIA-certified laboratory partner and detailed results are delivered to a secure portal within 3–5 business days — no prescription, no clinic visit required.
Why take this test
The SIBO/IMO Breath Test provides a simple, non-invasive way to measure hydrogen and methane gas levels in your breath which are two key indicators of bacterial or methanogen overgrowth in the small intestine. Using an at-home collection kit, you’ll capture breath samples over a timed testing period after drinking a glucose or lactulose solution. This process tracks how your digestive system processes the substrate, revealing patterns of fermentation linked to SIBO or IMO. Before starting, you’ll follow a brief preparation period that includes a specialized diet and fasting to ensure accurate results. On test day, you’ll collect a baseline sample, drink the provided substrate, and then complete additional breath samples at set intervals over approximately two hours. Throughout the process, you’ll avoid eating, sleeping, exercising, or smoking to maintain the integrity of your results. Once your samples are complete, simply package the tubes in the provided materials and send them to the laboratory using the prepaid shipping label. Expert analysis of your results identifies abnormal gas production patterns, helping Dr. Fowl determine whether SIBO or IMO is contributing to your digestive symptoms.
Who it's for
You should consider this test if you have any of the following health concerns:
- Bloating and gas
- Abdominal pain or cramping
- Diarrhea or constipation
- Irregular bowel movements
- Food intolerances or sensitivities
- SIBO (Small Intestinal Bacterial Overgrowth)
- IBS (Irritable Bowel Syndrome)
- IMO (Intestinal Methanogen Overgrowth)
- Digestive discomfort after meals
- Unexplained digestive symptoms
- Need to identify personal food triggers
How it works
1. Prepare for testing by following a short pre-test diet and fasting period to clear your system and ensure accurate results.
2. Drink the test solution (glucose or lactulose) provided in your kit, which helps detect bacterial and methanogen activity in your small intestine.
3. Collect timed breath samples using the enclosed tubes at regular intervals over about two hours to measure hydrogen and methane gas levels.
4. Send your samples to the laboratory using the prepaid shipping label for expert analysis of your results.
5. Review your results with Dr. Shannyn Fowl to identify signs of SIBO or IMO and receive personalized recommendations for improving your digestive health.
Please note: For legal reasons, the initial consult with Dr. Fowl is required for this test. Both the initial and followup consults are included in the price of this test.
What's included
An initial consult with our ND, Dr. Shannyn Fowl.
You will receive a test kit in the mail that contains the following:
- Instructions for Use
- Laboratory Requisition Form
- Wrapped collection straw
- Substrate packet (either glucose or lactulose)
- 10 collection tubes in a vacuum-sealed pack
- Sample label card with 10 labels
- Prepaid return shipping label
- 2 Bubble wrap bags for packaging of samples
A followup consult with Dr. Fowl to go over the test results (optional).
What people are saying
Be the first to review this test
Write a reviewNo. Our lab tests can be ordered directly without a doctor's visit or prescription.
Most results are available within 3–5 business days after the lab receives your sample.
Yes. Results are delivered through a secure platform and your data is never sold to third parties.
Absolutely. You can download your results as a PDF and share them with any healthcare provider.