Niacinamide for the treatment of melasma: an integrative review of randomized clinical trials. Research, Society and Development, [S. l.], v. 11, n. 11, p. e198111133581, 2022. DOI: 10.33448/rsd-v11i11.33581. Disponível em: https://rsdjournal.org/rsd/article/view/33581. Acesso em: 14 dec. 2025.