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Older Siblings' Peanut Consumption Raises Allergy Risk for Younger

3/6/2026

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Summary

Story summary

A study presented at the American Academy of Allergy, Asthma & Immunology meeting finds younger siblings face higher peanut allergy risk when older siblings eat peanuts.
Not introducing peanuts in year one increases the risk of sensitization 16-fold and of allergy 13-fold, especially for children with eczema.
Early introduction of peanuts reduces this risk.
Results are preliminary until published in a peer-reviewed journal.

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Story summary

A study presented at the American Academy of Allergy, Asthma & Immunology meeting finds younger siblings face higher peanut allergy risk when older siblings eat peanuts.
Not introducing peanuts in year one increases the risk of sensitization 16-fold and of allergy 13-fold, especially for children with eczema.
Early introduction of peanuts reduces this risk.
Results are preliminary until published in a peer-reviewed journal.