Prevention of Food Allergies Updated

The landmark Learning Early About Peanut Allergy (LEAP) clinical trial, published in 2015, fundamentally changed the guidance that pediatricians and allergy specialists offer to parents concerning the introduction of peanut-based foods to infants at high risk for food allergies.

The study revealed that introducing age-appropriate peanut foods early and consistently can reduce the likelihood of developing a peanut allergy by over 80 percent compared to total avoidance. In the trial, high-risk infants between 4 and 10 months of age were divided into 2 groups: one that strictly avoided peanut products and another that consumed them multiple times a week. By the age of 5, the children who had regularly consumed peanuts since infancy demonstrated a drastically lower rate of peanut allergy.

• Infants presenting with egg allergies or severe cases of eczema (i.e., atopic dermatitis) are categorized as high-risk candidates. For these children, experts advise the supervised introduction of peanut-based items, such as peanut butter thinned with breast milk or formula, to proactively mitigate the risk of allergy development.
• According to the Addendum Guidelines, high-risk infants who have already transitioned to solids should begin consuming peanut-containing products between 4 and 6 months of age, provided safety is confirmed. The protocol necessitates an initial consultation with an allergy specialist for diagnostic testing, followed by the supervised, first-time introduction of peanut items within a clinical setting.
• Infants categorized within the moderate-risk bracket – Characterized by the presence of mild to moderate eczema—who have successfully initiated solid food consumption are eligible for home-based intervention. Unlike their high-risk counterparts, these children do not require a formal clinical evaluation by an allergy doctor; parents may begin the domestic introduction of peanut-containing foods at approximately 6 months of age.
• Infants classified within the low-risk category – Those exhibiting no clinical history of egg allergy or atopic dermatitis may be introduced to peanut-containing items based on parental discretion. While this typically occurs at approximately 6 months of age, it is imperative that the child is in optimal health; the initial introduction should be deferred if the infant is experiencing acute illness, such as a “cold”, emesis, or gastrointestinal distress. Furthermore, the protocol stipulates that these specific food items should only be incorporated into the diet after the successful initiation of other solid foods, ensuring that peanut products are never the primary solid food introduced to the infant.

After the new guidelines were implemented, research conducted at the Children’s Hospital of Philadelphia (CHOP) and published in the journal Pediatrics in 2025 demonstrated a substantial 43 percent decline in peanut allergy prevalence among children under 3 years of age during the preceding several years.

Further investigation conducted by CHOP indicated that implementing early intervention strategies yielded a 36 percent decrease in the overall incidence of pediatric food sensitivities. This reduction encompassed various common allergens, such as milk, eggs, and tree nuts, providing compelling evidence that the updated clinical protocols are effectively facilitating large-scale, practical preventative outcomes.

Research conducted through a cross-sectional investigation in Melbourne, Australia, demonstrated that the strategic, early incorporation of egg-based foods into infant diets was linked to a significant decrease in the overall prevalence of egg allergies within the population. These results hold considerable significance for infants displaying early-onset eczema (i.e., atopic dermatitis), a demographic inherently predisposed to heightened food sensitivities, among whom markedly higher rates of diminished egg allergy occurrence were documented.

These conclusions offer compelling empirical support for modern pediatric nutrition protocols, emphasizing the proactive incorporation of peanut and egg products during early infancy as a viable strategy to enhance population-wide allergy prevention outcomes.

The board certified allergy specialists at Black & Kletz Allergy see both adult and pediatric patients and have over 50 years of experience in the field of allergy, asthma, and immunology. If you or your child has food allergies, may have food allergies, or has eczema (I.e., atopic dermatitis) the allergists at Black & Kletz Allergy may be able to help you. We have 3 convenient locations with on-site parking located in Washington, DC, McLean, VA (Tysons Corner, VA), and Manassas, VA. The Washington, DC and McLean, VA offices are Metro accessible and we offer a free shuttle that runs between the McLean, VA office and the Spring Hill metro station on the silver line. To schedule an appointment, please call any of our offices or you may click Request an Appointment and we will respond within 24 hours by the next business day. Black & Kletz Allergy has been servicing the greater Washington, DC metropolitan area for over 50 years and we look forward to providing you with the highest state-of-the-art allergy care in a friendly and relaxed environment.