Kojic acid is primarily used in skincare for its skin-lightening and brightening properties, particularly to reduce hyperpigmentation and even out skin tone. It works by inhibiting melanin production, the pigment responsible for skin color, which can help fade dark spots, age spots, and other forms of hyperpigmentation. Additionally, kojic acid can help reduce the appearance of scars and can be found in products like creams, lotions, serums, and even soaps.