Decoding Hyperpigmentation from Biological Mechanisms to Actives with Clinically Proven Topical Efficacy: A Narrative Review. - Duval, Christine; Qiu, Jie; Warrick, Emilie; Sextius, Peggy; Castiel-Higounenc, Isabelle; Xiang, Leihong; Bernerd, Francoise; Passeron, Thierry (Dermatology & Therapy, 2026)