코직산, or Cojic Acid, is a natural compound derived from the fermentation of Aspergillus oryzae, a type of fungus used in traditional Japanese food production. It is primarily known for its skin-lightening properties and is often used in cosmetic products to reduce the appearance of dark spots and hyperpigmentation. In addition to its cosmetic benefits, 코직산 has antioxidant properties that help protect the skin from damage caused by free radicals. It is commonly found in creams, serums, and soaps, making it a popular ingredient in skincare routines aimed at achieving a more even skin tone.