Figure 2From: 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 dietThe control group consisted of 19 healthy volunteers without any food related symptoms and 25 patients with non-allergic food intolerance. As indicated for the 20 patients with carbohydrate malassimilation food allergy was specifically excluded by clinical diagnostics, skin tests, specific serum IgE and in unclear cases (n = 6) even with double-blinded, placebo-controlled food challenges with negative findings.Back to article page