Additional Study Information: This is an experimental research study for individuals with allergy to peanuts or peanut-containing food. Oral (by mouth, not injection) immunotherapy may reduce a patients sensitivity to a specific allergen by exposing the patient to small amounts of the substance causing the allergic reaction and then gradually increasing the amount of allergen over time. Although immunotherapy does not cure an allergy, for many, it lessens the bodys sensitivity to the allergen, resulting in fewer symptoms.