Columbianetin is a new phytoalexin associated with celery (Apium graveolens) resistance to pathogens during storage, it also has antifungal activity. Columbianetin has anti-inflammatory effects, it promotes histamine release, and inhibits the histamine release by substance P, suggests that it may be helpful in regulating mast cell-mediated allergic inflammatory responses. (2’S)-columbianetin can be effectively used to protect keratinocytes from UVB induced damage.