Fructose Breath Test

Procedure Questions

What is a Fructose Breath Test?

It’s a test that helps diagnose an intolerance to fructose, a naturally occurring sugar that’s found in many foods.

Procedure Bullet Points

The Fructose Breath Test is:

  • Performed in-office
  • Well-tolerated

First you will take a baseline breath sample. Then you will drink a fructose solution, and wait for one hour before taking another breath sample. You will take one breath sample every hour for three hours and you will take a total of 4 breath samples.

If left undiagnosed, it can lead to symptoms including:

  • Nausea
  • Bloating
  • Diarrhea
  • Abdominal pain
  • Excess gas

Your doctor will give you instructions to prepare for the Fructose Breath Test. There is a 1 day preparation period. You’ll likely be on a modified diet for the first 12 hours, and you’ll likely fast for the second 12 hours.

Inform your doctor of:

  • Any medication that you take regularly
  • Any known allergies to medication
  • Any medical conditions that will require special attention, such as;
    • heart conditions
    • lung conditions
    • any other major conditions

It’s important to follow all of your doctor’s instructions.

After you ingest the solution you will collect a sample every hour for 3 hours.

In that time do not:

  • Eat
  • Smoke
  • Sleep
  • Exercise or perform vigorous activity

Your doctor will go over the results of the Fructose Breath Test with you. Your doctor may recommend modifications to your diet if a fructose intolerance is detected.

You may resume:

  • your normal activities
  • your normal diet, unless otherwise advised
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