Early peanut introduction: To test or not to test?
Jennifer J Koplin1, Vicki McWilliam2, Victoria X Soriano3
1Murdoch Children's Research Institute, Melbourne, Victoria, Australia; Child Health Research Centre, University of Queensland, Brisbane, Queensland, Australia.
Insights
Introducing peanut products to infants before 12 months can help prevent peanut allergy. Current guidelines suggest early introduction without routine allergy testing for most infants.
Area of Science:
- Allergy prevention
- Pediatric nutrition
- Immunology
Background:
- Peanut allergy is a growing public health concern.
- International guidelines now recommend early peanut introduction for prevention.
- Debate exists regarding allergy testing before introduction.
Purpose of the Study:
- Review evidence on early peanut introduction for allergy prevention.
- Update on guidelines and the role of pre-testing.
- Analyze impact on infant feeding and allergy rates.
Main Methods:
- Narrative review of published literature.
- Inclusion of randomized controlled trials and observational studies.
- Presentation of arguments for and against pre-introduction testing.
Main Results:
- Global guidelines advocate introducing peanut before 12 months in high-prevalence areas.
- US guidelines have shifted away from routine pre-testing for high-risk infants.
- Early introduction without testing is safe and effective, though population-level allergy reduction was less than anticipated.
Conclusions:
- Current evidence supports early peanut introduction without routine allergy testing.
- Testing, if performed, should involve shared decision-making and access to definitive diagnosis.
- Focus is on safe and effective implementation of early introduction strategies.
Objective:
To review recent evidence and international guidelines on early peanut introduction for preventing peanut allergy and provide an update on the status of the debate around testing before early peanut introduction.
Data Sources:
Review of published literature documenting: infant feeding guidelines; impact of early peanut introduction on peanut allergy; risk factors for peanut allergy; and impact of early peanut introduction guidelines on infant feeding practices and allergy.
Study Selection:
We used a narrative approach and present both pro and con arguments for testing before peanut introduction. Data from randomized controlled trials and post-hoc analyses of these trials and observational studies were included.
Results:
Allergy prevention guidelines around the world now consistently recommend introducing peanut into an infant's diet before 12 months of age for countries with high peanut allergy prevalence. In the US, guidelines recently shifted away from recommending allergy testing before introduction for those at risk of peanut allergy. There is evidence primarily from Australia that recommending early introduction without prior testing is safe and effective in increasing early peanut introduction for both high and low-risk infants, although the subsequent reduction in peanut allergy prevalence at the population level was less than expected.
Conclusion:
Current evidence supports recommending early peanut introduction without routinely testing for peanut allergy. If testing is offered, this should be based on shared decision making between families and practitioners and only be undertaken where there is provision for rapid access to definitive diagnosis including oral food challenges.
