Ace the Louisiana Cosmetology Exam 2025 – Glam Up Your Career!

Before using any new product on a client, it is crucial for a cosmetologist to check the ingredient list for potential allergens. This step is essential because allergens can trigger adverse reactions in clients, ranging from minor irritations to severe allergic responses. By reviewing the ingredient list, the cosmetologist can identify any substances that the client might be sensitive or allergic to, thus ensuring their safety and comfort during the treatment.

The emphasis on checking for allergens also aligns with professional standards and best practices in the cosmetology field, highlighting the importance of client health and safety over other considerations. While aspects like fragrance, expiration dates, and brand reputation are relevant to product selection, they do not directly address the immediate concern of potential allergic reactions, which can significantly impact a client's wellbeing. Therefore, checking the ingredient list for allergens is the most critical step before using a new product.