SIBO Breath Test — Three Gases, at Home or in Branch

Testing for Small Intestinal Bacterial Overgrowth

SIBO Breath Test — Small Intestinal Bacterial Overgrowth

Many people experience persistent bloating, troublesome gas, heaviness after meals or altered bowel habits for years, sometimes with an IBS diagnosis but no clear explanation. One possible cause is small intestinal bacterial overgrowth (SIBO), which can be investigated with a SIBO test using breath samples collected at home.

gases measured
H₂ · CH₄ · H₂S

24h
Results in
working day

🏠
Home collection
Available nationwide

🎯 View the Test Offer and Price
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What does the test include?

Breath collection bags, test solution and detailed Arabic instructions

Hydrogen (H₂), methane (CH₄) and hydrogen sulphide (H₂S), providing a broader gas profile than two-gas tests.

Riyadh, Jeddah, Dammam, Abha, Najran and other cities across the Kingdom

A report explaining the findings, with telephone or WhatsApp support to help you understand the results.

Approximately one working day after sample receipt.

Laboratory quality standards with careful sample handling and storage.

Which three gases are measured?

H₂

Hydrogen

Often considered when investigating diarrhoea and bloating associated with intestinal bacterial fermentation.

> 20 ppm within the first 90 minutes

CH₄

Methane

Associated with constipation and methane-producing archaea in the intestinal tract.

> 10 ppm at any time

H₂S

Hydrogen sulphide

May be associated with diarrhoea and can affect the interpretation of hydrogen readings.

Measured directly at parts-per-billion (ppb) concentrations.

How does the test work?

1. 1 Order your kit online through WhatsApp or the offer page, then arrange delivery to your address.
2. 2 Receive the kit at home and follow the instructions about when to prepare and collect samples.
3. 3 Follow the breath collection instructions by filling the numbered bags every 15 minutes for 90 minutes (seven bags), according to your kit's protocol.
4. 4 Return the samples by express courier or branch drop-off within 24 hours of collection.
5. 5 Receive your results We contact you when analysis is complete and send your detailed digital report.

What's in the test kit?

• 📦 Numbered breath collection bags for correct sample tracking
• 🌬️ Sealed breath bags designed to preserve the samples
• 🧪 Test solution selected according to the protocol
• 🏷️ Identification labels to match the samples to you
• 📖 A detailed Arabic instruction booklet explaining each step

💡 The appearance of kit items may vary slightly without changing the testing procedure.

Preparing for the Test

Medicines and supplements

Antibiotics

Proton pump inhibitors (PPIs)

Probiotics and fibre supplements

Fasting and test day

• 🚰 Fast for 8–12 hours; only water is allowed.
• 🚭 Avoid smoking and chewing gum for 12 hours before collection.

Diet on the day before testing

✅ Permitted foods

• Cooked meat, chicken or fish
• Eggs
• White rice or white pasta
• White bread
• Lightly cooked vegetables such as carrots or courgettes

❌ Foods to avoid

• Legumes such as lentils, chickpeas and beans
• Gas-producing vegetables such as broccoli, cabbage and onions
• High-sugar fruits such as apples and pears

When might this test be considered?

💨 Recurring unexplained bloating or gas

🔄 Persistent constipation or diarrhoea

🥗 Malabsorption or vitamin deficiency despite an adequate diet

🏥 An IBS diagnosis with a need to investigate possible SIBO

⚖️ Difficulty managing weight despite dietary changes

🤢 Persistent nausea or heaviness after meals

Common Mistakes That May Affect Results

• ⏰ Not following the agreed medicine preparation instructions
• 🍎 Eating highly fermentable foods before testing
• 📦 Delaying sample return or exposing samples to air
• 🫁 Not sealing the breath bags securely
• 🚬 Smoking or chewing gum shortly before collection

Why Choose Trust Medical Labs?

A clear, easy-to-use kit
Detailed, step-by-step Arabic instructions

Prompt results
Approximately one working day after sample receipt

Direct support
Telephone or WhatsApp support to explain the results

Nationwide coverage
Cities across Saudi Arabia

Accredited laboratory
Quality testing with careful sample handling

Graphical report
Gas curves with clinical interpretation

How Can You Make the Most of Your Test?

• 📝 Keep a symptom record to share with your doctor.
• 👨‍⚕️ Review the results with your doctor or dietitian to plan appropriate care.
• 🔍 Discuss whether further investigations are needed after a positive result.
• 📁 Keep your electronic or printed report in your medical records.

🎯 Ready to take the first step?

Explore the test offer and order your home collection kit.

🎯 View the Offer and Price
💬 WhatsApp
📞 920022632

SIBO Testing FAQs

What is a SIBO breath test?

A home breath test used to investigate small intestinal bacterial overgrowth. It measures hydrogen (H₂), methane (CH₄) and hydrogen sulphide (H₂S), gases associated with intestinal microbial fermentation, without a blood draw or invasive procedure.

How do I perform the test at home?

The kit includes numbered breath bags, a test solution and instructions. Following the supplied protocol, collect breath samples every 15 minutes over 90 minutes (seven bags), then arrange their return.

When will I receive the results?

Results are usually available approximately one working day after the laboratory receives the samples. We contact you when your detailed digital report is ready.

Is the test available across Saudi Arabia?

Yes. Home delivery is available across Saudi Arabia, including Riyadh, Jeddah, Dammam, Abha and Najran.

How do hydrogen, methane and hydrogen sulphide results differ?

Hydrogen is often considered with diarrhoea and bloating; methane is associated with constipation; hydrogen sulphide may be associated with diarrhoea. Your doctor interprets the pattern alongside symptoms to decide on appropriate care.

Can children have SIBO testing?

Children who can follow the breath collection instructions may be tested after a doctor confirms suitability and the appropriate test solution dose.

When should SIBO testing be considered?

Discuss testing with your doctor if persistent post-meal bloating and gas, IBS-like symptoms, unexplained vitamin B12 or iron deficiency, long-term acid-suppressing treatment or previous digestive surgery warrant further assessment. Your doctor decides whether and when repeat testing is appropriate after treatment.

How much does SIBO testing cost at Trust?

The three-gas home SIBO test is SAR 950, including the kit, shipping and interpreted report. Current pricing and offers are shown on the SIBO test offer page.

How do SIBO and SIFO testing differ?

SIBO concerns bacterial overgrowth and is commonly investigated with breath testing. SIFO concerns fungal overgrowth. The fungal assessment offered by this service uses a stool sample; discuss the appropriate investigation with your doctor. More information is available on the fungal testing page. To learn more about SIBO, read The Complete SIBO Guide: Causes, Symptoms and Treatment.

Scientific references

1. Rezaie A, et al. Hydrogen and Methane-Based Breath Testing in Gastrointestinal Disorders: The North American Consensus. Am J Gastroenterol. 2017;112(5):775-784.
2. Pimentel M, et al. ACG Clinical Guideline: Small Intestinal Bacterial Overgrowth. Am J Gastroenterol. 2020;115(2):165-178.
3. Tansel A, Levinthal DJ. Understanding Our Tests: Hydrogen-Methane Breath Testing to Diagnose SIBO. Clin Transl Gastroenterol. 2023;14(4):e00567.
4. Singer-Englar T, et al. Hydrogen Sulphide in Exhaled Breath: A Potential Biomarker for SIBO in IBS. Aliment Pharmacol Ther. 2016;44(5):558-563.
5. Lim J, Rezaie A. Pros and Cons of Breath Testing for SIBO and IMO. Gastroenterol Hepatol (N Y). 2023;19(3):140-148.

Related Advanced Digestive Tests

• Advanced Digestive Health Tests
• Microbiome and Gut Bacteria Testing
• Order a Three-Gas SIBO Test

Related articles

• Bad Breath and SIBO
• Your Complete Guide to SIBO Testing
• SIBO and SIFO: What Is the Difference?
• Dietary Guidance for People with SIBO

Dr A

Medical review: Dr Ahmed Faisal Hassan Al Alawi

PhD in Molecular Genetics, Robert de Sorbon University, France | Member of the Royal College of Pathologists, UK | Founder and Director, Biolab, Bahrain (since 2015)

Last reviewed: November 2026

Medical disclaimer: This page provides educational information only. It does not replace specialist medical advice or diagnose or treat a health condition. Consult your doctor before making health decisions based on this page.