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Breath Test

Medically reviewed by Last updated on Jun 5, 2024.

What do I need to know about a breath test?

A breath test measures the amount of certain gases produced in your digestive system. The test may be used to diagnose conditions such as carbohydrate (lactose or fructose) intolerance, bacterial overgrowth syndrome, or H. pylori infection.

How do I prepare for a breath test?

Your healthcare provider will tell you how to prepare for your test. Directions will depend on the test you need. Your provider may tell you not to eat or drink anything for a certain time before your test. Your provider will tell you if it is okay to brush your teeth on the day of your test.

What will happen during a breath test?

Breath Test

What should I expect after a breath test?

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.