Sounds like a great thing doesn't it?
In the United States, castoreum has been approved by the Food and Drug Administration (FDA) as a food additive, often referenced simply as a "natural flavoring" in the product's list of ingredients. While it can be used in both foods and beverages as a vanilla, raspberry and strawberry flavoring, the annual industry consumption is only around 300 pounds.
Castoreum (pronunciation: /kęˈstɔriəm/) is the exudate from the castor sacs of the mature North American Beaver (Castor canadensis) and the European Beaver (Castor fiber). Within the zoological realm, castoreum is the yellowish secretion of the castor sac in combination with the beaver's urine, used during scent marking of territory. Both male and female beavers possess a pair of castor sacs and a pair of anal glands located in two cavities under the skin between the pelvis and the base of the tail.