Say hello to one of skincare’s best-kept secrets. Cysteamine is a dermatologist-favored ingredient known for its powerful ability to target stubborn discoloration, hyperpigmentation, and uneven skin tone. Originally used in medical applications, this potent antioxidant works deep within the skin to reduce the appearance of dark spots while protecting against environmental damage. Unlike traditional brightening agents, cysteamine is both highly effective and gentle, making it a must-have for those seeking a more even complexion.