The test takes 2 hours. You drink a small amount of lactose gel. You breathe into a balloon & a vial is inserted when u exhale. They do this increments up to 2 hours. I go to a Dr in Philly and just heard of this. They are very up to date as a research hospital. It's worth a shot.
I don't have pouchitis was tested for that a few times. This is a recent study and xifaxan is the treatment, so they say. I shall c and let u know.