From the American Academy of Allergy, Asthma & Immunology:
Oral immunotherapy (OIT) refers to feeding an allergic individual an increasing amount of an allergen with the goal of increasing the threshold that triggers a reaction. For example, a person allergic to peanuts may be given very small amounts of peanut protein that would not trigger a reaction.
OIT is a leading investigational and now, marketed treatment, offering the hope of protection from food allergy reactions. However, like most chronic diseases, food allergy treatment will not be a “one size fits all” approach. Ultimately, the choice of treatment will be based on individual and family factors after careful discussion with one’s physician.