| abstract |
The present invention provides a melanin decomposition inhibitor that suppresses the decomposition of melanin in keratinocytes and enhances melanin accumulation in skin and hair. The melanolysis inhibitor of keratinocytes is effective at least one selected from the group consisting of plant extracts containing berberine or its salts, berberine or its salts, proguanil or its salts, and phenformin or its salts. Element. |