Skip to content
A study funded by the National Institute of Allergy and Infectious Diseases (NIAID), part of the U.S. National Institutes of Health, examined the effects of peanut consumption by children under five on allergy rates in adolescence. The findings, published in NEJM Evidence, offer new hope for long-term allergy prevention strategies.
A Global Perspective on Allergy
Allergic reactions occur when the immune system identifies certain substances as potential threats. Common symptoms include rashes, swelling, itching, gastrointestinal disorders, allergic rhinitis, and difficulty breathing. In severe cases, an acute allergic reaction can lead to anaphylactic shock, a life-threatening condition. Complications may lead to asthma, which significantly deteriorates an individual’s quality of life.
Approximately 30-40% of the global population currently suffers from one or more allergic conditions. Air pollution and rising temperatures are continually increasing the percentage of people affected by these disorders. Food allergies affect an estimated 220 million people worldwide, with peanut allergy being one of the most prevalent. About 2% of children in Western countries suffer from peanut allergies. In the United States alone, peanut allergy affects approximately 1.2 million children, and this number continues to rise.
Early Intervention Proven Effective
The LEAP-Trio analysis builds on previous research, including the clinical trial Learning Early About Peanut Allergy (LEAP) and the LEAP-On study. In the trial, children who regularly consumed peanut products from an early age up to five years had an 81% lower risk of developing a peanut allergy by the age of five compared to those who avoided peanuts. The LEAP-On study demonstrated that most children maintained their tolerance even after a year of avoiding peanuts.
Today’s findings should reinforce parents’ and caregivers’ confidence that feeding their young children peanut products beginning in infancy according to established guidelines can provide lasting protection from peanut allergy. If widely implemented, this safe, simple strategy could prevent tens of thousands of cases of peanut allergy among the 3.6 million children born in the United States each year.
NIAID Director Jeanne Marrazzo, M.D., M.P.H.
Confirmation of Long-Term Benefits
The LEAP-Trio study, which involved 508 of the original LEAP participants, aimed to determine whether the protective effect of early peanut consumption persists into adolescence. The participants, whose average age at the time of the study was 13, were divided into two groups. The first group included those who regularly consumed peanuts in early childhood, while the second group included those who avoided them. The study found that only 4.4% of children in the peanut consumption group had a peanut allergy by the age of 12 and older, compared to 15.4% in the peanut avoidance group.
This significant difference highlights the long-term benefits of early peanut consumption. Even when children were allowed to avoid peanuts in later years, the initial exposure protected against the development of allergies. Overall, regular early peanut consumption reduced the risk of peanut allergy in adolescence by 71% compared to early peanut avoidance. These findings are crucial, as peanut allergy can lead to serious, sometimes life-threatening reactions.
Successfully reducing the rate of peanut allergies could significantly lessen the burden on healthcare systems and improve the quality of life for millions of people. The study’s findings emphasize the importance of early dietary interventions in preventing allergies and may lead to updated recommendations for parents and healthcare professionals.
