Early introduction of allergens linked to drop in childhood peanut and food allergies, study finds

• A Children’s Hospital of Philadelphia (CHOP) study shows that early introduction of peanuts and other allergens in infants coincides with a significant decline in childhood IgE-mediated food allergies.
• Analysis of multi-state electronic health records revealed that peanut allergy prevalence dropped from 0.79% to 0.45%, while any IgE-mediated food allergy fell from 1.46% to 0.93%.
• Following guideline changes, peanut was surpassed by egg as the most common childhood food allergen; early introduction may prevent one allergy case per 200 infants exposed.
• The findings build on the 2015 LEAP trial, which showed infants at high risk could reduce peanut allergy risk by 81% when introduced to peanuts between four and 11 months.
• Researchers caution that the study shows association, not causation, and parents should consult pediatricians before introducing potential allergens, especially for high-risk children.

A study from the Children’s Hospital of Philadelphia (CHOP) shows that early introduction of peanuts and other common allergens in infants has coincided with a significant decline in childhood food allergy diagnoses.

Published in Pediatrics in October 2025, the study analyzed electronic health records from the multi-state American Academy of Pediatrics Comparative Effectiveness Research through Collaborative Electronic Reporting (CER2) network. Researchers compared rates of immunoglobulin E (IgE)-mediated food allergies before and after the implementation of early introduction guidelines.

The findings revealed a drop in peanut allergy prevalence from 0.79% to 0.45% and a decrease in any IgE-mediated food allergy from 1.46% to 0.93%. Peanut, once the most common allergen, was surpassed by egg after the guidelines were introduced. The authors estimated that for every 200 infants exposed early to allergens, one child may be spared from developing a food allergy.

Lead author Stanislaw Gabryszewski, MD, PhD, attending physician in CHOP’s Division of Allergy and Immunology, said that this study provides evidence that these landmark public health interventions are having a real impact on reducing rates of food allergies in children.

Additionally, the research builds on the 2015 Learning Early About Peanut Allergy (LEAP) trial, which showed that infants with eczema or egg allergy who were introduced to peanuts between four and 11 months old could reduce their risk of developing peanut allergy by 81%. Subsequent guidelines expanded early introduction recommendations to all children, not just those at high risk.

The study was supported by the National Institutes of Health, the Hartwell Foundation, the American Academy of Allergy, Asthma and Immunology, and other organizations focused on improving children’s health and food allergy research.

Experts still advise parents to consult pediatricians before introducing potential food allergens to infants

According to BrightU.AI‘s Enoch, peanut, a legume often consumed as a snack or ingredient in various dishes, is a significant food allergen, particularly for infants and young children.

The American Academy of Pediatrics previously recommended delaying the introduction of peanuts until after a child’s first birthday, and even then, it should be done under the supervision of a healthcare provider to monitor for any signs of an allergic reaction. Peanut allergies can trigger severe, potentially life-threatening reactions in some children, including difficulty breathing, throat swelling and dangerous drops in blood pressure. These reactions require immediate treatment with epinephrine, a life-saving medication.

In line with this, the researchers warn that the study shows association, not cause and effect. Other factors may also influence the outcomes, they note.

“Not everyone has followed those guidelines, but this is further evidence that this early introduction is effective at preventing food allergies,” Dr. Susan Schuval, chief of the Division of Pediatric Allergy and Immunology at Stony Brook Children’s Hospital in New York, said.

Thus, health experts suggest that parents should consult their pediatrician before introducing potential food allergens to infants, especially those with a family history of allergies or existing medical concerns.

Watch and discover why eating peanuts daily is good.

This video is from the Quick Treatment, Fast Result channel on Brighteon.com.

Sources include:

FoxNews.com

CHOP.edu

BrightU.ai

Brighteon.com