What is the primary function of a tonic?

The primary function of a tonic in skincare is to remove oil from the skin after cleansing. A tonic, often referred to as a toner, is designed to help balance the skin's pH after it has been cleansed. Cleansing can sometimes strip the skin of its natural oils, creating an imbalance. A toner helps to remove any residual impurities, oil, and makeup that may still be present, ensuring that the skin is clean and properly prepped for subsequent skincare treatments.

Additionally, tonics can provide a refreshing feeling and may contain ingredients that help tighten the pores and improve skin texture. While some tonics may also incorporate hydrating elements, their primary purpose is to enhance the cleansing process and support overall skin clarity.