I've had one, and yes, you drink a bottle of lactose liquid. Then breath into bags like every 15-30 minutes for an hour or so. I don't remember how long.
If you are lactose intolerant, you will probably be in the loo for the rest of the day.
Mine came out negative, but I still do not drink or eat dairy per this diet as Heather says even if you do not show lactose intolerant from a test, dairy can still be a problem for us IBSers.
I did not have any D after the test, or even any worse problems than usual, so I don't know why I avoid it, except that this diet says not to consume it. 
Maybe someone can explain why we are suppose to avoid it even if we don't test positive for lactose intolerance.
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~ Beth
Constipation, pain prodominent,cramps, spasms and bloat!
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Re: Lactose Intolerance Breath Test
