Effect of Omalizumab in the Skin of Food Allergy Patients

The goal of this interventional study is to evaluate whether skin barrier abnormalities occur in subjects with a food allergy, as determined by positive oral food challenge (OFC). The main question it aims to answer is whether these skin barrier abnormalities can be reversed by omalizumab. If there is a comparison group: Researchers will compare non-food allergic participants (who do not receive omalizumab) to see if they experience skin barrier abnormalities. All food allergic participants will receive 4 months of Omalizumab treatment as well as two Oral Food Challenges. Participants will all undergo skin barrier assessments.