What is the main purpose of emulsifiers in cosmetics?

The main purpose of emulsifiers in cosmetics is to stabilize mixtures of immiscible substances, such as oil and water. Emulsifiers facilitate the blending of these two phases by reducing the surface tension between them, allowing for the creation of a stable emulsion. This is crucial in cosmetic formulations where it is often necessary to combine ingredients that do not naturally mix, ensuring that the product has a uniform consistency, enhanced shelf life, and effectiveness.

While the other options may refer to different aspects of cosmetic formulation—such as reducing odors, adding color, or creating foams—they do not capture the primary function of emulsifiers. In essence, emulsifiers play a pivotal role in the formulation of creams, lotions, and other products where stability of the mixture is essential to overall performance and user experience.