Washington Master Esthetics Practice Exam

What are moisturizers commonly known as?

1. Emulsifiers

2. Hydrators

3. Surfactants

4. Thickeners

The correct answer is: Hydrators

Moisturizers are commonly referred to as hydrators because their primary function is to add moisture to the skin. They work by enhancing the skin's water content and preventing water loss, which is essential for maintaining healthy, supple skin. Hydrators often contain ingredients that attract water, such as hyaluronic acid, glycerin, and aloe vera, which help to keep the skin hydrated and comfortable. Other terms in the choices, such as emulsifiers, surfactants, and thickeners, refer to different properties or functions in cosmetic formulations. Emulsifiers help to blend oil and water in products, surfactants are primarily used for their cleansing properties and help in reducing surface tension, while thickeners modify the viscosity and texture of products. However, none of these terms directly describe the primary role of moisturizers, which is to hydrate the skin effectively.