Pullulan

Pullulan is naturally occurring, as a cell wall component for organisms such as fungus Aureobasidium pullulans.
Pullulan is produced from starch by the fungus Aureobasidium pullulans.
As an edible, bland and tasteless polymer, the chief commercial use of pullulan is in the manufacture of edible films that are used in various breath freshener or oral hygiene products such as Listerine Cool Mint PocketPaks. As a food additive, it is known by the E number E1204.