abstract |
The present invention provides a whitening agent containing the cold water extract from the tissue of Humulus lupulus as the active component. The cold water extract of the present invention preferably comprises at least one kind of a flavonoid glycoside selecting from a group consisting of astragalin, astragalin malonylglycoside, isoquecitrin, isoquecitrin malonylglycoside, quercetin malonyl glycoside, kaempferol rutinoside, kaempferol malonyl glycoside, rutin and phloracylophenone glycoside. |