What is the function of a hair tonic?

A hair tonic serves primarily to stimulate the scalp and add shine to hair. This emphasizes its role in maintaining healthy hair and scalp conditions. Ingredients in hair tonics often include essential oils, herbal extracts, and other nourishing components that invigorate the scalp, promoting blood circulation and potentially enhancing hair growth. Additionally, tonics typically have a light texture, which allows them to provide a subtle shine without weighing the hair down, thus improving overall appearance.

While options related to heat protection, moisture retention, and styling serve important functions, they do not encompass the primary purpose of a hair tonic, which focuses specifically on stimulation and shine enhancement.