research DNA Methyltransferases in Malar Melasma and Their Modification by Sunscreen in Combination with 4% Niacinamide, 0.05% Retinoic Acid, or Placebo
This study found that DNA hypermethylation was present in melasma lesions, and treatments with sunscreen, niacinamide, and retinoic acid were associated with decreased methylation and clinical improvement.