Some individuals with food allergies can outgrow them over time. This depends on the individual and the specific food. The process is known as developing an “oral tolerance” to the food allergen.
Approximately 80% of individuals with an allergy to cow milk, egg, wheat, and soy will outgrow it by their teenage years. This usually happens by the age of 16. Approximately 20-25% of children with peanut allergies will outgrow it by late childhood. Allergies to tree nuts are outgrown about 14% of the time. Only 4-5% of individuals with allergies to fish or shellfish will ultimately outgrow these allergies.
An oral food challenge, overseen by a board-certified allergist, is the best way to see if a particular allergy has been outgrown.