Israeli Study Finds Skin Contact with Food Allergens Rarely Triggers Severe Reactions in Children

A new Israeli study led by Dr. Idith Lachover-Rot from Rambam Hospital examined the effects of skin exposure to food allergens in children diagnosed with food allergies. The research involved 182 children aged one to 18, all with confirmed food allergies, excluding those with a history of severe allergic reactions requiring intensive care or multiple epinephrine doses. Over 263 controlled exposures, small amounts of allergens such as milk, eggs, sesame, peanuts, and nuts were applied to intact skin for 15 minutes to observe any allergic responses.

Results showed that nearly 84% of exposures caused no reaction, about 15% led to mild localized skin responses, and only 1% resulted in more extensive but still localized skin reactions. Importantly, none of the children developed systemic symptoms or anaphylaxis. The study also found that younger children and those with compromised skin barriers were more prone to skin reactions, but the type of allergen was less significant than individual factors.

Despite these findings, the study did not include children with previous severe allergic reactions to skin contact, and it only tested small allergen amounts on limited skin areas. Researchers caution that the results do not apply to larger exposures, damaged skin, or allergen contact with mucous membranes, which could increase risk. The study suggests that accidental skin contact with small allergen quantities poses a very low risk of severe reactions, potentially easing parental anxiety.

Dr. Lachover-Rot emphasized that while the findings provide evidence-based reassurance, they do not justify introducing allergens into public spaces like schools or playgrounds. Families of allergic children must remain vigilant, avoid allergen ingestion, carry epinephrine injectors, and educate their communities. The research highlights the emotional and practical challenges families face managing food allergies and the importance of continued awareness and precaution in public settings.

This study contributes to understanding food allergy risks and may help refine safety guidelines, but it does not change current medical recommendations for managing food allergies in children.