Astringents

Astringents are clear to slightly tinted liquids that tighten pores and remove excess oil from the skin. They work by contracting proteins in the skin, reducing shine and refining texture, making them ideal for toners, acne treatments, and aftershaves. 

Popular INCI ingredients in this segment include Witch hazel, tannins, and aluminum salts. The trend favors botanical-based astringents for gentler skin care. Sub-types range from alcohol-based versions for deep cleansing to hydrating formulas for sensitive skin. Regulations focus on balancing efficacy with skin tolerance.