Overview DNA Methylation in Malar Melasma and Its Change by Sunscreen, Retinoic Acid and Niacinamide. Status: Completed Trial end date: 2016-12-01 Target enrollment: Participant gender: Summary BACKGROUND: Malar melasma has a chronic and recurrent character that may be related with epigenetic changes. Phase: Early Phase 1 Details Lead Sponsor: Universidad Autonoma de San Luis PotosÃTreatments: NiacinNiacinamideNicotinic AcidsSunscreening AgentsTretinoin