Unless you call 'natural flavoring' a preservative, none of the unsalted butter I looked at had preservatives. (Always like to keep my facts straight so I looked it up)
Not going to argue the point with you (I just have this gut feeling) but by law food has to list what's in it.
April
>>>If you are buying butter off the shelf or even stock butter from a supplier and you think it has no preservatives you better look again.<<<
-Jebus