Recent scientific findings suggest a seemingly innocuous snack, the cashew nut, is becoming a significant and often unexpected culprit behind severe allergic reactions in children across Europe. Researchers from Berlin`s prestigious Charité clinic have published findings in the journal Allergy, shedding new light on this growing health concern.
The study analyzed data from the European Anaphylaxis Registry, covering the period from 2007 to 2024. Out of 5,945 registered food-related allergic reactions reviewed, a substantial portion—1,389 cases—were attributed specifically to tree nuts. What stands out remarkably is that among pediatric cases resulting in anaphylaxis, the most severe form of allergic reaction, cashews topped the list. Cashews were identified as the cause in 334 cases, significantly surpassing reactions linked to other common nuts like hazelnuts (211 cases) and walnuts (146 cases).
Adding to the concern, the data revealed that these severe reactions could be triggered by remarkably minute quantities of cashew—less than a single teaspoon in many instances. This highlights the potency of the allergen, even in trace amounts.
Perhaps the most surprising and critical aspect highlighted by the study is the apparent lack of awareness among those affected. The vast majority of individuals experiencing these severe reactions—77 percent of children and a striking 79 percent of adults—were reportedly unaware they had a cashew allergy prior to the incident. Furthermore, the critical life-saving intervention, administration of adrenaline (epinephrine), was documented in a surprisingly low percentage of cases: just 13 percent for children and a mere 3 percent for adults treated outside of a clinical setting. This underscores a significant gap in both public knowledge and emergency preparedness regarding severe nut allergies.
The authors of the study emphatically state that reported cases of cashew-induced anaphylaxis are demonstrably on the rise, particularly within the pediatric population. This concerning trend firmly establishes cashews as one of the most significant allergens within the tree nut category, demanding increased vigilance and awareness from parents, educators, and healthcare providers alike. While other nuts, such as walnuts, are often celebrated for their potential health benefits (like reducing inflammation and potentially lowering certain cancer risks, as suggested by previous research), the humble cashew presents a different, and increasingly serious, health consideration for many families.
