Abstract

Methods for the diagnosis of gastrointestinal disorders in human or lower animal subjects comprising the steps of administering to said subject a safe and effective amount of urea and analyzing the breath of said subject for the presence of carbon dioxide or ammonia products of the hydrolysis of said urea, wherein the presence of said hydrolysis products is a positive indication of a gastrointestinal disorder in said subject. Preferably the administered urea contains isotope-labelled nitrogen or carbon.

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