# One Third of Infants Outgrow Peanut Allergies Within One Year New research reveals many babies naturally resolve peanut allergies before reaching their first birthday. - **Source:** [New Scientist – Health](https://www.newscientist.com/subject/health) - **Published:** 2026-11-04 - **Topic:** [health](https://brifing.si/c/health) - **Original article:** - **On Brifing:** https://brifing.si/s/602b2427-7015-4539-92dd-934045ae6e33 ## Unexpected Allergy Resolution Rates Recent clinical data indicates that over one-third of infants previously diagnosed with peanut allergies safely tolerate the allergen during follow-up testing. This finding suggests a significant portion of early-life allergies are transient, potentially sparing children from years of strict dietary restrictions and the psychological burden associated with managing severe food-related medical conditions. ## Australian Public Health Initiative Since 2024, Australia has provided free oral immunotherapy treatments for infants diagnosed with peanut allergies under twelve months old. Managed by ten public children's hospitals, this program involves administering gradually increasing doses of peanut flour over two years to desensitize the immune system, provided the initial diagnosis is confirmed through clinical testing. ## Oral Food Challenge Protocol Before starting treatment, infants undergo an oral food challenge to assess allergy severity under medical supervision. Children receive escalating doses of peanut flour, totaling 2500 milligrams, which is equivalent to two teaspoons of peanut butter. This specific threshold is designed to trigger a reaction in any child who possesses a genuine, persistent peanut allergy. ## Surprising Clinical Trial Results Among the first 778 infants tested, 35 percent showed no reaction to the peanut flour despite having prior clinical histories of rashes, swelling, or hives. These infants also previously displayed positive skin prick or blood test results, making the high rate of spontaneous resolution a surprising outcome for the medical team involved in the study. ## Diagnosis and Treatment Implications Infants who pass the oral food challenge are cleared of their allergy label and do not require immunotherapy. Parents are advised that they can safely reintroduce peanuts into the child's diet at home. This process prevents unnecessary medical interventions and avoids the potential risks associated with long-term, restrictive avoidance of common food allergens. ## Understanding Transient Immune Responses The exact mechanism behind why these infants stop reacting to peanuts within six months remains unclear. Researchers suggest it may be a transient allergy, where the immune system initially produces an aberrant response to the food protein that does not persist. This differs significantly from previous findings that allergies typically resolve by age six. ## Long-term Benefits of Early Screening Removing an allergy label early in life prevents the anxiety of accidental exposure and the necessity of carrying emergency medication. Furthermore, early reintroduction of peanuts may actually prevent the development of a true, lifelong allergy, as strict avoidance during infancy is known to increase the risk of developing persistent food sensitivities later in life. ## Future Diagnostic Management Standards Experts suggest that routine oral food challenges should become a standard diagnostic step before starting immunotherapy. While current practices rely heavily on clinical history and blood tests, incorporating direct food challenges is cost-effective and ensures treatment is only provided to those who truly need it, minimizing risks like anaphylaxis during the medical process. ## Sources covering this story - https://www.newscientist.com/article/2597292-a-third-of-babies-with-peanut-allergy-grow-out-of-it-by-1-year-old/?utm_campaign=RSS|NSNS&utm_content=health&utm_medium=RSS&utm_source=NSNS — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._