OBJECTIVES: The term histamine intolerance stands for a range of symptoms
involving various effector organs after the consumption of histamine-rich food.
Our intention was to objectify and quantify histamine-associated symptoms and to 
analyse whether oral administration of the histamine-degrading enzyme diamine
oxidase (DAO) caused a reduction of symptoms.
PATIENTS AND METHODS: Four Austrian
centres participated. Patients suspected to be histamine intolerant were
recruited. The first step consisted...

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