Kojic acid is a skincare ingredient commonly used in products targeting hyperpigmentation and uneven skin tone.
It works primarily by interfering with tyrosinase activity, an enzyme involved in melanin production. By reducing excessive pigment formation, kojic acid may gradually improve the appearance of dark spots and certain forms of hyperpigmentation.
However, kojic acid can cause irritation or sensitivity in some people, particularly depending on its concentration and the overall formulation.
Consistent sunscreen use is essential when treating pigmentation because continued UV exposure can contribute to the formation and recurrence of dark spots.
As with most active skincare ingredients, stronger does not necessarily mean better. An effective routine should balance results with maintaining a healthy skin barrier.