4-Butylresorcinol is a synthetic phenolic compound widely used in cosmetic and dermatological formulations, primarily as a skin-lightening and brightening agent. It functions by inhibiting the activity of tyrosinase, a key enzyme involved in melanin production, thereby helping to reduce hyperpigmentation, age spots, and uneven skin tone. With good skin penetrability and stability, 4-butylresorcinol is considered an effective and safer alternative in many topical applications.
