Kojic acid is a natural compound derived from fungi, particularly from the fermentation of rice. It is commonly used in skincare products for its ability to lighten skin and reduce the appearance of dark spots, hyperpigmentation, and uneven skin tone. This compound works by inhibiting the enzyme tyrosinase, which is essential for the production of melanin, the pigment responsible for skin color. As a result, kojic acid can help achieve a brighter complexion and is often found in creams, serums, and soaps designed for skin lightening.