When should I introduce egg to my baby?

Current ASCIA guidelines for Australian infants recommend introducing egg — along with other allergenic foods — at around 6 months of age when starting solid foods, and specifically not delaying beyond this point. For infants with established eczema, the advice is to discuss timing with a GP or paediatric allergist, as these infants are at higher allergy risk and may benefit from additional guidance. The old advice to delay highly allergenic foods until 12 months or beyond has been overturned by evidence and is no longer current.

Does this finding mean egg allergy is going away?

No. The study found a relative reduction of 17.7% in prevalence — a meaningful shift, but egg allergy remains one of the most common food allergies in Australian infants. The finding means that population-level adherence to updated guidelines is having a measurable effect. It does not mean all families received or followed updated advice, and it does not mean egg allergy will disappear. Infants with eczema remain at the highest risk and need individualised guidance.

Early egg introduction: AU guidelines cut infant egg allergy rates by 18%

What just happened

A study led by Associate Professor Jennifer Koplin from the University of Queensland, published June 8, 2026 in the peer-reviewed literature, has confirmed what a decade of trial evidence had been building toward: updating Australian infant feeding guidelines to recommend earlier egg introduction has measurably reduced egg allergy rates in the population.

The study compared two Australian population-based cohorts — one recruited before the guideline change and one after — and found a 17.7% relative reduction in egg allergy prevalence following the 2016 update to ASCIA’s infant feeding and allergy prevention guidelines. That guideline shift moved the recommendation from delaying egg introduction (the old advice, held through much of the 2000s and early 2010s) to introducing egg alongside other solids at around 6 months of age.

For infants with early eczema — the group at highest allergy risk — the effect was more pronounced. Egg allergy rates in this population fell from roughly 35% to around 22%. That is not a marginal statistical signal. It is a meaningful real-world reduction in a group who previously bore disproportionate allergy burden under the old delay advice.

The lead researcher’s conclusion was direct: the study “provides population-level evidence that updated infant feeding guidelines recommending earlier introduction of egg led to measurable reductions in the population prevalence of egg allergy.”

The both-and

This is robust evidence that a guideline change — when grounded in trial data — can shift population disease burden. It also illustrates both the reach and the inherent limits of natural experiment designs.

Why this study matters beyond the individual trial

The evidence for early egg introduction has been building for years. The LEAP trial in the UK, the EAT trial, the Australian STAR trial — all showed that early introduction in specific trial populations reduced allergy risk. The limitation of those trials is what they always share: does this translate once it leaves the controlled setting and enters real-world clinical practice?

The University of Queensland study is specifically designed to answer that question. By comparing two independent population-based cohorts — one drawn in the period before and one after the 2016 ASCIA guideline update — it captures what actually happened when GPs, maternal and child health nurses, and families had access to updated advice. The 17.7% relative reduction says: yes, the translation held at the population level.

The signal in the eczema group is particularly significant. Infants with early eczema were previously the cohort most likely to be advised toward delay — on the logic that they were at higher risk and therefore needed more caution. The 2016 guideline update explicitly reversed this: early introduction, not delay, is the approach supported by the evidence for this group. The fact that the largest benefit appears in this exact population confirms the mechanism and gives practitioners strong grounds for counselling families accordingly.

What the guideline change actually was

Before 2016, Australian guidance — following older ASCIA and NHMRC positions from the late 1990s and 2000s — recommended that infants thought to be at elevated allergy risk delay introduction of highly allergenic foods including egg, peanut, and seafood until 12 months or beyond. This advice was well-intentioned but drawn from evidence that had not yet caught up with the emerging RCT data.

The 2016 ASCIA revision was a significant pivot. Introduce allergenic foods, including egg, at around 6 months alongside the introduction of other solids. Do not delay in high-risk infants — if anything, earlier introduction is the priority for infants with eczema or a family history of allergy. The pivot was not a small administrative tweak; it reversed a decade of widely communicated clinical advice.

What the study doesn’t resolve

Population-level guideline uptake is never uniform. Some families received and acted on updated advice promptly; others heard older guidance from well-meaning relatives, older resources, or clinicians whose practice lagged the guideline update. The 17.7% relative reduction is the population average across this real-world variability — which means the effect in families who did consistently receive updated advice is likely even larger.

The study’s cross-sectional natural experiment design also cannot fully isolate the egg introduction change from other concurrent shifts in infant feeding practice. Peanut introduction guidance changed over the same period; formula composition changed; awareness of eczema and allergy prevention grew generally. These are the inherent constraints of a design that trades the tight controls of an RCT for real-world external validity. They do not invalidate the finding, but they mean the causal estimate is best understood as a conservative lower bound.

2 cents

If you are around families with babies approaching 6 months, this research backs a clean message: don’t wait on egg. The old instinct to delay allergenic foods as a precaution is no longer the evidence position. It is, in fact, the approach the evidence moved away from a decade ago.

For families navigating a baby with eczema: the guideline specifically supports early egg introduction in this group, and the ASCIA guidelines provide detailed guidance. If there is genuine concern about how to do this safely given the level of eczema, a conversation with your GP or a paediatric allergist is worth having before solids begin — not as a reason to delay, but to have a plan for introducing egg in a way that feels manageable.

For GPs: this study is supportive evidence that current counselling practice is working. When families ask whether to delay egg introduction “just to be safe,” the answer backed by Australian population data is now clear.

This is general health information and does not constitute individual clinical advice.

Verdict

Verdict: yes — worth knowing about.

A well-designed Australian natural experiment confirms that the 2016 ASCIA guideline shift to earlier egg introduction delivered a measurable real-world reduction in egg allergy prevalence — 17.7% relative reduction overall, with a larger absolute reduction in the highest-risk eczema group. For GPs counselling families starting solids, this is population-level evidence that the current guideline-driven approach is working. For families: the old delay advice is out of date. Introduce egg alongside other solids at around 6 months.