The goal of this study is to evaluate the effectiveness of a new blood test for Eosinophilic Esophagitis (EoE). Eligible participants include patients undergoing their first upper endoscopy for evaluation of EoE, or who have already been diagnosed with EoE, but whose food sensitivities are currently unknown. The findings of this study will contribute to the development of clinical diagnostic tools (ie. blood tests for food allergies) that will decrease the time needed to identify food sensitivities, and subsequently reduce the time to symptom resolution for newly diagnosed patients with EoE.

The purpose of this registry is to gather information from people with food allergies. The information collected includes allergic reactions, specific food allergies, and how food allergies affect people's quality of life. Participants are directed to a website, complete a consent form, and then are prompted to answer on-line questionnaires about their food allergies. Participants are compensated for their time.