A Hydrogen Breath Test (or HBT) is used as a clinical medical
diagnosis for people with
irritable bowel syndrome, and common
food intolerances. The test is simple,
non-invasive, and is performed after a short period of
fasting (typically 8 hours). Tests vary from country to country, so the following information is provided as a rough guide to typical uses of the hydrogen breath test:
Fructose malabsorption - the patient takes a base reading of hydrogen levels in his/her breath. The patient is then given a small amount of
fructose and / or
sorbitol (typically 20 to 25 g), and then required to take readings every 15 to 30 minutes for two to three hours. If the level of hydrogen rises to 20 points or more above the base reading, and is sustained for at least two readings, then the patient has fructose malabsorption.
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