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“Primary prevention to avoid tree nut allergy in general is necessary, followed by the education of patients about the potential role of cofactors, which were present in up to 50% of affected adults and which might have increased the reaction severity from otherwise mild to anaphylactic reactions,”
—Margitta Worm, Charité – Universitätsmedizin Berlin
In 2024, the CDC reported a 14% increase in food allergy diagnoses among children. (Source 2024) Prompt recognition of symptoms and treatment is crucial.
Key Findings and Reactions
Among children, 40% of TIA cases were triggered by cashews, 25% by hazelnuts, and 17% by walnuts. Hazelnut caused 44% of adult cases, with walnut and almond accounting for 20% and 15%, respectively. Moreover, 76% of children reacted to less than a tablespoon of cashew, compared to 20% of adults.
Despite prior reactions reported in a significant percentage of cases, a low percentage of patients were aware of their tree nut allergy beforehand, emphasizing the need for improved patient education and preparedness.






