Hydrogen (H₂) and Carbon Isotope (¹³C) Breath Tests – Non-Invasive Digestive Diagnostics in Budapest

Breath tests are simple, non-invasive, and completely painless diagnostic methods used to detect various digestive disorders. In Budapest, our medical centers offer hydrogen (H₂) and ¹³C urea breath tests for the diagnosis of conditions such as lactose or fructose intolerance, SIBO (small intestinal bacterial overgrowth), and Helicobacter pylori infection.

When is a breath test recommended?

• Lactose intolerance

• Fructose malabsorption

• SIBO (Small Intestinal Bacterial Overgrowth)

• Helicobacter pylori infection

Helicobacter pylori Breath Test – How It Works

Unlike other hydrogen-based tests, the Helicobacter pylori test uses a ¹³C urea-based solution. After drinking the test solution, the presence of H. pylori is detected by measuring the amount of carbon dioxide with the ¹³C isotope in your exhaled breath.

 Test procedure:

1. The test is performed on an empty stomach.

2. An initial breath sample is collected at the beginning.

3. The patient drinks a special urea-containing liquid.

4. After 30 minutes, a second breath sample is taken.

5. The samples are analyzed to detect elevated levels of ¹³C-labeled carbon dioxide, indicating the presence of H. pylori bacteria in the stomach.

How to Prepare for the Test

• Stop taking antibiotics, proton pump inhibitors (PPIs), and bismuth-containing medications at least 4 weeks prior to the test.

• The day before the test, avoid dairy products, alcohol, heavy meals, and smoking.

• On the test day, do not use toothpaste or mouthwash; rinse with plain water only.

• No food or drink (except a small amount of water) should be consumed at least 6 hours before the test.

Other Hydrogen Breath Tests

For lactose, fructose, or lactulose intolerance testing, patients drink a solution containing the test sugar. Over a period of 180 minutes, breath samples are taken every 20–30 minutes to measure the hydrogen concentration in exhaled air. An abnormal rise indicates improper digestion or bacterial overgrowth.

Fast, Painless, and Reliable Diagnostics in Budapest

Whether you are experiencing chronic bloating, abdominal pain, or unexplained digestive symptoms, breath tests provide a fast and reliable way to uncover the underlying cause. The Helicobacter pylori breath test in Budapest is a safe and accurate method available at many private clinics. Book your appointment today and take the first step toward a healthy digestive system!