Circadian profiling reveals higher histamine plasma levels and lower diamine oxidase serum activities in 24 of patients with suspected histamine intolerance compared to food allergy and controls

摘要

BackgroundHistamine intolerance is thought to trigger manifold clinical symptoms after ingesting histamine‐rich food due to reduced activity of diamine oxidase (DAO). No study has hitherto systematically assessed daily fluctuations of histamine levels and DAO activities in symptomatic patients. The aim of the study was to investigate the presence of histamine intolerance, to therefore establish day profiles of histamine levels and DAO activities, and to compare the results between patients with suspected histamine intolerance, food allergy and healthy controls.