Chewable comvita propolis tablets are the best way to take large doses of premium comvita propolis for internal use 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 in 2 propolis tablets pfl 15 delivers at least 15mg of propolis flavonoids per 2 tablets chewable comvita propoli