Comvita Extra Strength Propolis Oral Spray is an easy-to-use spray combining high quality propolis, UMF® 10+ Manuka honey, peppermint, clove and myrrh oils. Bees make propolis by gathering resin or sap from plants and combining it with enzymes. Packed with bio-flavonoids, they use propolis to protect their hives from infection. Comvita®’s PFL™ stands for Propolis Flavonoid Level and refers to the flavonoid content found per dose. PFL™ 30 delivers at least 30mg of Propolis flavonoids per dose, double that of PFL™15.