Tennessee Cosmetology Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

The primary benefit of using a serum in skin care is to deliver potent ingredients directly to the skin. Serums are typically formulated with a high concentration of active ingredients that can penetrate deeply into the skin layers, addressing specific concerns such as fine lines, pigmentation, or acne. This targeted delivery system makes serums particularly effective for treating skin issues compared to more general moisturizers or creams.

While hydration is important, serums often contain lighter formulations that are not primarily designed for hydration, although many can provide some moisture alongside their active ingredients. Enhancing makeup is not a function of serums, as they are focused on skincare rather than cosmetic applications. Protection from sun damage is generally the role of sunscreen or specific sun-protective products rather than a serum. Therefore, the unique ability of serums to concentrate active ingredients for targeted treatment is what sets them apart in skin care.