What is the purpose of a toner in a skincare routine?

A toner serves a crucial role in a skincare routine primarily by helping to remove any residual impurities that may remain after cleansing. This is particularly important because even the best cleansers can leave behind traces of makeup, dirt, and oils. By incorporating a toner, individuals can ensure their skin is thoroughly cleansed and free from these impurities.

Additionally, toners are designed to help balance the skin's pH levels. After cleansing, the skin can sometimes become more alkaline, which can lead to irritation or imbalance. A well-formulated toner, often containing beneficial ingredients, can restore the skin's natural acidity, contributing to overall skin health.

The other options do not accurately capture the primary functions of a toner. While some toners may have hydrating properties, the main purpose extends beyond mere hydration to include thorough cleansing and balancing the skin. Toners are not intended to provide UV protection or exfoliation; those functions are typically fulfilled by other specific products within a skincare regimen.