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 comvitas 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 do