"Allergen-free" refers to products or environments that do not contain common allergens, which are substances that can trigger allergic reactions in sensitive individuals. These allergens often include peanuts, tree nuts, dairy, eggs, gluten, soy, and shellfish. Allergen-free options are important for people with food allergies or intolerances, as they help prevent adverse health effects. In food labeling, "allergen-free" indicates that the product has been made without specific allergens or has been processed in a way to minimize cross-contamination. This is crucial for maintaining safety for those with allergies, allowing them to enjoy meals without fear of allergic reactions.