Histamine-reduced diet and increase of serum diamine oxidase correlating to diet compliance in histamine intolerance.
Eur J Clin Nutr. 2018 Jul 18. doi: 10.1038/s41430-018-0260-5. [Epub ahead of print]
- Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Heinrichstrasse 31a, A-8010, Graz, Austria.
- Institute of Laboratory Medicine, General Hospital Steyr, Sierninger Straße 170, A-4400, Steyr, Austria.
- Clinical Institute of Medical and Chemical Laboratory Diagnosis, Medical University of Graz, Auenbruggerplatz 30, A-8036, Graz, Austria.
- Practice for General Internal Medicine, Dr. Theodor Körnerstrasse 19b, A-8600, Bruck, Austria. firstname.lastname@example.org.
Diagnosis of histamine intolerance (HIT) has been based on low serum diamine oxidase (DAO) values, functional gastrointestinal disorders and improvement of symptoms with a histamine-reduced diet (HRD). In a retrospective analysis of outpatients’ charts we identified 101 patients with HIT. After a median of 13 months, a questionnaire was distributed to the patients so that they could be classified into four diet-compliance groups. Calculated with all 101 patients we found an increase of serum DAO values due to a HRD. In the 63 patients that completed the questionnaire, we found that 50 patients had improvement of symptoms or no continuing symptoms. A significant increase of serum DAO levels was found in the patients with strict and occasional diet compliance. Therefore, we demonstrate that a HRD is not only improving symptoms in HIT, but is causing an increase in serum DAO values that correlates with the degree of diet compliance.