Astringent
Definition
An astringent is a topical product or ingredient that causes the contraction of skin cells and tissues, temporarily tightening the skin and reducing the appearance of pores. Traditional astringents often contain alcohol, witch hazel, or salicylic acid. They were historically popular for oily and acne-prone skin to help control excess sebum production. However, modern dermatology has moved away from harsh alcohol-based astringents because they can strip the skin's natural moisture barrier, leading to irritation, dryness, and even increased oil production as the skin compensates. Today, gentler alternatives like witch hazel distillates, niacinamide, or BHA-based toners are preferred for managing oily skin without compromising barrier function.
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