With Apitherapy Raw Honey, Licorice Root and Usnea Herbal Supplement We use the synergy of raw honey, propolis, licorice root and Usnea (a lichen) in this spray for maximum effectiveness. Propolis is a resin that honey bees gather from pine and poplar trees which is used to coat the inside of the bee hive to maintain a sterile environment. Naturally containing flavonoids, propolis is intended to help provide nutritive support for a healthy immune system.