Which of the following is a common allergen that baristas should be aware of?

Dairy is a common allergen that baristas should be particularly vigilant about. Many customers may have lactose intolerance or a dairy allergy, which can lead to severe reactions if not properly catered to. Given the prevalence of dairy in typical coffee drinks, such as lattes, cappuccinos, and even in flavorings, it's crucial for baristas to be aware of this allergen.

This awareness helps ensure that baristas can accommodate customers’ dietary restrictions effectively, providing alternatives such as almond milk, soy milk, or oat milk, which may be preferred or necessary for those who cannot consume dairy. Understanding allergens not only enhances customer service but also promotes safety in the café environment.