An update on international practice variation in peanut introduction: conundrums, controversies, and a new direction

Area of Science:

• Allergy and Immunology
• Pediatric Allergy
• Preventive Medicine

Background:

• Early introduction of peanut is associated with an 81% relative risk reduction in peanut allergy among high-risk infants (severe eczema, egg allergy).
• International guidelines show significant variation in risk stratification before peanut introduction.
• Current US screening policies are costly and less effective than international models advocating universal early introduction.

Purpose of the Study:

• To review the evidence supporting early peanut introduction for allergy prevention.
• To compare the effectiveness and practicality of universal early introduction versus risk-based screening approaches.
• To discuss the implications of "screening creep" in current US policy.

Main Methods:

• Review of current literature on peanut introduction and allergy prevention.
• Comparative analysis of international and US policies on peanut allergy screening.
• Examination of population-level data from Australia regarding early peanut introduction.

Main Results:

• Universal early peanut introduction without prescreening, as practiced in Australia, leads to high rates of timely introduction and low rates of severe reactions.
• US-based screening approaches are associated with increased costs and a tendency towards "screening creep," testing individuals not indicated for screening.
• Early introduction without a risk-based screening approach is more effective in reducing peanut allergy development.

Conclusions:

• Universal early peanut introduction is a more effective and practical strategy for preventing peanut allergy compared to risk-based screening.
• Shared clinical decision-making can support family-centered approaches to food allergy prevention.
• Policy-level changes promoting universal early introduction could improve public health outcomes regarding food allergies.