As a new instrument for the laboratory diagnostic clarification of DAO inhibition, we offer the determination of the histamine elimination ratio (HERO). This test is a valuable addition to the determination of DAO and histamine and helps to distinguish between DAO inhibition and DAO deficiency.
For the quantitative determination of the level of histamine elimination in serum indicates whether the degradation of histamine is disturbed because DAO is inhibited, e.g. due to medications or alcohol