Which food item is most likely to cause an allergic reaction?

Fish is known to be one of the common allergens that can cause severe allergic reactions in sensitive individuals. Seafood allergies, which include reactions to fish as well as shellfish, are prevalent and can lead to symptoms ranging from mild hives to life-threatening anaphylaxis. This allergic response occurs because the proteins found in fish elicit an immune response in those who are allergic, causing a range of symptoms when they consume or come into contact with the allergen.

On the other hand, while chicken, rice, and potatoes can cause allergic reactions, they are far less common compared to fish. Chicken allergies exist but are not as prevalent as seafood allergies. Rice and potatoes are generally well-tolerated by most people, and while some may experience sensitivities, they do not frequently provoke the aggressive immune response associated with fish allergies. This makes fish the most likely food item among the options listed to cause an allergic reaction.