Kojic acid can inhibit the synthesis of tyrosinase, so it can strongly inhibit the formation of melanin in the skin, and is safe and non-toxic, and will not produce sequelae of leukoplakia. Therefore, Kojic acid has been formulated into lotion, facial mask, lotion, skin cream, It is a high-end whitening cosmetic that can effectively treat freckles, age spots, pigmentation, and acne.