Abstract
Main urinary bacterial metabolites of phenylalanine (total benzoic and phenylacetic acids) and of tyrosine (total p-hydroxybenzoic acid and p-hydroxyphenylacetic acid) were determined by gas chromatography in controls and patients with cystic ubrosis of the pancreas, coeliac disease, intestinal resection and unclassified enteritis. In various patients, especially in the untreated coeliacs,
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