| 摘要 |
Provided is an orally-administered agent for skin whitening which is easily ingested and highly effective as a skin whitener. Specifically, provided is an orally-administered agent for skin whitening that contains, as an active ingredient, a group of substances and hydrogenated substances that have a specific germacrone-like skeleton and are refined from one or more types of Curcuma zedoaria Roscoe extract. The orally administered agent contains, as active ingredients, zederone, furanodienone, curzerenone, hydrogenated zederone and hydrogenated furanodienone, which are prepared from a Curcuma zedoaria Roscoe extract and are not bitter. |
