Hydrogen breath test

A painless, non-invasive test designed for the detection of various digestive disorders, such as small intestinal bacterial overgrowth (SIBO) and lactose, sorbitol and fructose malabsorption.

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Hydrogen breath test

What does it consist of?

Intestinal bacteria release hydrogen as they break down sugars, which in turn is transferred into the bloodstream and into the lung, and expelled to the outside world through respiration. By measuring the concentration of hydrogen in exhaled air, we can detect digestive disorders by identifying disturbances in the digestion and absorption of specific sugars.

The test consists of measuring the amount of hydrogen in exhaled air after administering a substrate sugar. The procedure begins with a baseline measurement of exhaled hydrogen, where the patient blows into a device that analyses the composition of their breath. Substrate sugar is then administered and additional measurements are taken every 15 to 30 minutes over a period of 1 to 2.5 hours. The time interval and total duration of the test will depend on the type of digestive disorder to be studied.

At CreuBlanca, we offer the possibility of performing the exhaled hydrogen test in the consultation room or in the comfort of your own home.

Cases in which it is recommended

To whom?

This test is intended for people with symptoms of SIBO and lactose, sorbitol or fructose intolerances, such as:

Bloating or abdominal distension
Gas and flatulence
Diarrhoea
Abdominal pain
Nausea
Unintentional weight loss

If you have hereditary fructose intolerance, you should not take the exhaled hydrogen test.

Instructions

How should you prepare?

To perform the test, it is necessary to follow these indications:

Stop taking antibiotics four weeks before the test.
Follow a diet free of sugars and starches 24 hours before the test.
Avoid intense physical exercise for 6 hours before the test.
Do not smoke 2 or 3 hours before the test or during the test.
Fast on the day of the test.

Medical professionals

The specialists who will assist you at CreuBlanca

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