What is the main purpose of using a toner in skincare?

Using a toner in skincare primarily serves the function of balancing the skin's pH. After cleansing, skin can often be left slightly more alkaline, especially with certain cleansers that strip away natural oils. A toner helps restore the skin's natural acidic pH, which is essential for its overall health and function.

In addition to pH balancing, toners can also help in refining the appearance of pores, removing any residual cleanser or impurities left on the skin post-cleansing, and preparing the skin for the absorption of subsequent skincare products such as serums and moisturizers.

While some toners may offer hydration or moisture, their core purpose is centered around achieving pH balance. Therefore, while options focusing on moisture, makeup removal, or sun protection may address other aspects of skincare, they do not encapsulate the fundamental reason for toner's existence as effectively as the emphasis on pH balance.