From: Excretion of urinary histamine and N-tele methylhistamine in patients with gastrointestinal food allergy compared to non-allergic controls during an unrestricted diet and a hypoallergenic diet
Urinary methylhistamine (UMH) [μg/mmol creatinine x m2BSA]
Control group
Gastrointestinally mediated allergy (GMA)
>6.2*
12
70
≤6.2*
76
42
Total
88
112