By now you may have heard, thanks to Jamie Oliver and Dr. Oz, that castoreum is a natural flavor behind some of the products we consume. I use the word “behind” literally, since castoreum is the product of a beaver’s anal glands. Castoreum is totally unique, chemically speaking, to the beaver – not to be confused with that stinky defensive spray that comes from a skunk’s anal glands, or reason dogs walk in circles sniffing each other’s rear ends. Same place, different thing. Urban myth or no?