A member asked:

What is hydrogen breath test for lactose intolerance?

A doctor has provided 1 answer

See below.: The patient is given lactose after an overnight fast, after which exhaled air samples are collected before and at 30-minute intervals for 3 hours to assess hydrogen gas concentrations. If the concentration increases a lot, it proves the diagnosis.

Answered 11/26/2013

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A member asked:

What should one not eat before hydrogen breath test?

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