The Evaluation of Niacinamide-dipeptide Convergence as Skin Whitening Materials

The purpose of this study was to investigate the skin-whitening effects of Niacinamide-dipeptide Convergence (Niacin-peptide). To evaluate skin-whitening effects of Niacin-peptide, we performed tyrosinase inhibition assay and L-DOPA oxidation inhibition assay. These results demonstrated that Niacin-peptide decreased melanin production through tyrosinase inhibition. Also, we measured expression level of melanogenesis-related mRNA and proteins by reverse transcription-polymerase chain reaction (PCR) and western blotting. Results of PCR and Western blotting were showed that Niacin-peptide reduced expression of microphthalmia- associated transcription factor (MITF), tyrosinase related protein-1 (TRP-1), tyrosinase related protein-2 (TRP- 2) and tyrosinase. Thus, we identified the skin-whitening effect of Niacin-peptide and this finding demonstrated that Niacinamide-dipeptide Convergence may have potential as cosmetic ingredient.