Earlier egg introduction linked to lower infant egg allergy rates

Clinical Takeaway: Consider supporting guideline-based introduction of egg during infancy, including in higher-risk infants, as earlier egg exposure was associated with lower rates of egg allergy, particularly among children with early eczema.

Egg allergy is one of the most common food allergies in infancy. These findings provide real-world evidence that introducing egg earlier in infancy, as recommended by updated allergy-prevention guidelines, may help reduce the burden of egg allergy at a population level.

A decade after infant feeding guidelines shifted to recommend earlier egg introduction, researchers report a measurable decline in egg allergy prevalence among Australian infants.

In this cross-sectional study published in JAMA Pediatrics, investigators compared two population-based cohorts of 1-year-old infants recruited during routine immunization visits in Melbourne: 5,276 infants assessed before guideline changes (2007-2011) and 1,933 assessed after implementation of earlier egg-introduction recommendations (2018-2019). Infants underwent egg skin-prick testing, with oral food challenges used to confirm allergy when indicated.

The median age of egg introduction fell from 8 months before the guideline update to 6 months afterward. After adjusting for known allergy risk factors and temporal changes in the population, egg allergy prevalence decreased from 9.2% to 7.6%, an absolute reduction of 1.6 percentage points.

The benefit was even more pronounced among infants with early eczema, a group at elevated allergy risk. In these children, egg allergy prevalence declined from 34.6% to 21.9%, representing an adjusted absolute reduction of 12.7 percentage points.

The authors concluded that “updated infant feeding guidelines recommending earlier introduction of egg led to measurable reductions in the population prevalence of egg allergy,” suggesting that prevention-focused guideline changes can translate into meaningful public health gains when widely adopted.

Although egg allergy remains common, the findings offer encouraging evidence that early dietary introduction strategies may help prevent a substantial number of cases and reinforce current recommendations for timely introduction of allergenic foods during infancy.

Source: Koplin JJ, et al. (2026, June 8). JAMA Pediatr. Egg Allergy Prevalence Before and After Guidelines for Earlier Egg Introduction