| 摘要 |
PROBLEM TO BE SOLVED: To provide a skin function-improving agent which can regulate a biological balance to maintain and normalize the original functions of the skin. SOLUTION: This skin function-improving agent containing kojic acid and/or its derivative is provided. The skin function-improving agent is a cosmetic which can regulate a biological balance by the various latent actions of the kojic acid and/or its derivatives to maintain and normalize the original functions of the skin, and has excellent safety.
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