Clinical characteristics of soybean allergy in Europe: a double-blind, placebo-controlled food challenge study.

Background: Soybean is a relevant allergenic food, but little is known about individual threshold doses in soy allergy.

Objective: We sought to determine the clinical characteristics of soy allergy in Europe, including a dose-response curve.

Methods: Patients with a history of soy allergy underwent a titrated, double-blind, placebo-controlled food challenge.