Which allergen is not derived from a nut?

Wheat is the correct answer as it is not derived from a nut. Rather, it is a grain that is commonly used as a staple food in many diets around the world. Wheat is the source of flour, which is used in a variety of baked goods, pastas, and other products.

On the other hand, peanuts, almonds, and pistachios are all classified as tree nuts or legumes and are well-known allergens for many individuals. Peanuts are legumes, but they are frequently grouped with nuts due to their similar culinary uses and allergenic potential. Almonds and pistachios are true nuts. Understanding the distinction between these allergens is crucial for food safety, especially for individuals with nut allergies, who must carefully avoid products containing these ingredients.