Parents often ask if it is likely that their child will outgrow a food allergy. The answer differs for various foods. Most children allergic to cow's milk, egg, soy and wheat will outgrow their allergy between 3 and 16 years of age. The prognosis for peanuts and tree nuts is much different. Clinicians previously believed that a peanut allergy is life-long, but more recent studies show that 20% of peanut-allergic children outgrow the allergy. Less than 10% of children outgrow allergy to tree nuts.