Can children have a serious allergic reaction just by touching food? Israeli study says no

Parents of children with food allergies often live in fear that even accidental skin contact with allergenic foods can trigger severe reactions, leading to strict restrictions in settings like kindergartens. However, a significant Israeli study offers reassuring evidence that such anxieties may be largely unfounded.

Researchers at Rambam Health Care Campus in Haifa conducted a large multicenter study to evaluate the risk of systemic allergic reactions from controlled skin exposure to common food allergens in children with confirmed allergies. The study, led by Dr. Idit Lachover-Roth, director of the hospital’s allergy and clinical immunology unit, aimed to clarify what truly triggers significant allergic reactions.

The study involved 293 children and youths aged one to 18. Participants underwent patch testing where common allergens like milk, peanuts, eggs, sesame, and tree nuts were applied to their forearms for 15 minutes. A total of 465 patch tests were performed across the allergy group and a control group.

The findings, published in Acta Paediatrica, were consistent and reassuring. In 83.7% of exposures, no reaction occurred at all. Only 15% of children developed mild, localized skin reactions, such as redness or slight swelling at the contact site. Crucially, not a single child experienced a severe systemic allergic reaction or anaphylaxis from the skin contact alone. While accidental ingestion remains the primary risk for anaphylaxis, this study provides evidence-based guidance to ease parental concerns about non-ingestive exposure.

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The study is about skin contact, not eating the food, and not necessarily about food residues ending up on hands, toys, or tables and then being transferred to the mouth.