Tennessee Cosmetology Practice Exam

What is the primary benefit of using a serum on the skin?

1. To provide hydration

2. To deliver concentrated active ingredients

3. To act as a moisturizer

4. To remove impurities

The correct answer is: To deliver concentrated active ingredients

The primary benefit of using a serum on the skin lies in its ability to deliver concentrated active ingredients. Serums typically have a lightweight consistency and are formulated with a higher concentration of active agents compared to other skincare products, such as creams or lotions. This potent formulation allows serums to penetrate deeper into the skin layers, targeting specific skin concerns such as aging, pigmentation, or acne more effectively. While some serums may also provide hydration, that is not their primary function. Instead, their design is focused on addressing particular skin issues through the application of powerful substances. Unlike moisturizers, which primarily aim to hydrate and protect the skin's surface, serums work on a deeper level. Furthermore, while certain formulations might claim to help with impurities, serums are generally not designed for this purpose, as that function is typically associated with cleansers or exfoliants. Thus, the concentrated delivery of active ingredients is what predominantly distinguishes serums and highlights their significance in skincare routines.