4 doctors weighed in:

Why hydrogen breath test positive for lactose intolerance?

4 doctors weighed in
Dr. Cindy Juster
Pediatrics
3 doctors agree

In brief: 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.

In brief: 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.
Dr. Cindy Juster
Dr. Cindy Juster
Thank
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