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How do you get tested for Fructose Intolerance? What is a Fructose Breath Test?

There is a simple test for Fructose Intolerance or Fructose Malabsorption. It is simple and safe and does not involve needles.

For 24 to 48 hours before the test you will need to follow a diet to avoid foods that can interfere with the test result - the testing centre you book in with will give you a diet sheet. 

For 12 hours before the test you need to fast - but you can have water to drink.

When you arrive for your test, you will be given a glass of Fructose containing cordial to drink. Every 30 minutes you will breath into a bag or a device.

If your body does not absorb the Fructose well, then Bacteria in your gut will eat the Fructose and produce Hydrogen and Methane. Some of this Hydrogen and Methane dissolves in the bloodstream and is carried to your lungs, and then you breath it out.

The Breath Test measures the amount of Hydrogen or Methane in your breath, and if it rises - the test is positive and the diagnosis is made.

The usually takes about 3 hours and you are usually given the result on the spot!

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