| abstract |
Provided is a melanin decomposition inhibitor which can inhibit the decomposition of melanin in keratinocytes to accelerate the accumulation of melanin in skin and hair. An inhibitor of the decomposition of melanin in keratinocytes, which contains at least one component selected from a plant extract containing berberine or a salt thereof, berberine or a salt thereof, proguanil or a salt thereof and phenformin or a salt thereof as an active ingredient. |