Gastroenterology Clinic of San Antonio

Fructose Breath Test

This test evaluates for Fructose Malabsorption, which can cause the onset of common gastrointestinal symptoms, such as bloating, cramping and diarrhea. These symptoms arise when the fructose is allowed to pass through the digestive tract to the colon, where some bacteria can use the sugar as a food source. Unfortunately, in the process, hydrogen gas is liberated.

WHAT OCCURS DURING THE EXAMINATION?

Do not eat slowly digesting foods like beans, bran or other high fiber cereals the day before testing. You should fast after midnight with nothing to eat but are allowed to drink water only until the exam. You may brush your teeth the day of the test. You should not smoke, sleep, or exercise vigorously for at least ½ hour before, or at any time during testing. At home, three hours before your scheduled breath test, drink 12oz of regular (not diet) Coke or Pepsi. You will then report to the office and will be asked to breath into a small machine one time. The exam takes about 5 minutes. You will get your results before you leave.

ARE THERE ANY POSSIBLY COMPLICATIONS?

If you have the Fructose Maldigestion, your symptoms may be bloating, cramps, and diarrhea. These symptoms arise when the fructose is allowed to pass through the digestive tract to the colon.

WHAT TO EXPECT AFTER THE PROCEDURE

Some of your usual gas, bloating, or abdominal discomfort may occur.

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