SKIN INTRODUCTION SYSTEM AND LIGHTENING AGENT COMBINING CELL INTRODUCTION PEPTIDE AND SKIN INTRODUCTION ACCELERATOR
Provided is a skin introduction system capable of introducing a broad range of drugs efficiently into individual cells of each of the tissues of the skin. Also provided is a lightening agent that provides highly effective lightening using the system. The skin introduction system is characterized in combining a skin introduction accelerator into a peptide derivative obtained by adding to a drug a peptide comprising an amino acid sequence in which 3 to 13 residual groups of arginine are concatenated. The lightening agent includes a peptide derivative of hydroquinone obtained by adding to hydroquinone a peptide comprising an amino acid sequence in which 3 to 13 residual groups of arginine are concatenated, the lightening agent characterized in being combined with a skin introduction accelerator.