What is the purpose of a patch test before using a new product?

The purpose of a patch test before using a new product is primarily to check for allergic reactions or sensitivity. This is a critical step in skin care, particularly when introducing a new ingredient that the skin may not have encountered before. By applying a small amount of the product to a discreet area of the skin and observing it over a 24 to 48-hour period, individuals can determine if they have any adverse reactions, such as redness, itching, or swelling.

Conducting a patch test can prevent potential skin damage or discomfort before the full application of a product. While other factors like effectiveness, hydration, and scent are also important aspects of product evaluation, they are not the primary focus of a patch test. This specific focus on allergic reactions ensures skin safety and helps in choosing the right products tailored to individual skin types and sensitivities.