What binding substance is used to slow down the destruction of a product?

The use of an emulsifier as a binding substance is significant in formulating cosmetic and skincare products because it helps stabilize mixtures of water and oil. This stabilizing effect slows down the separation of ingredients and enhances the product's shelf life by preventing the degradation of the active ingredients. An emulsifier maintains the consistency, texture, and efficacy of the product over time, ensuring that it remains effective for consumers.

Contrastingly, surfactants primarily work to reduce surface tension and enhance the spreadability of products; humectants are designed to draw moisture, making them ideal in hydrating formulations; and active ingredients are the primary components that deliver the specific benefits of the product — none of these focus on the stabilization aspect that is key to an emulsifier’s function. Thus, the emulsifier's role as a binding agent is crucial in the preservation and performance of skincare formulations.