27+ Natural Vanilla Flavoring Comes From This Plant US. Want to find out where vanilla flavouring really comes from? You might want to sit down for this one, because according to reports, a chemical compound castoreum comes from a beaver's castor sacs, which are found between the pelvis and base of the tail.
If that's not bad enough for you, wait until you read about the substance.
That's where the term natural flavors comes in. Most people would imagine that they would come from vanilla bean and strawberry plants. Castoreum is a substance that is produced by a beaver's castor sac, which is found between the pelvis and the base of the tail. I believe the plant is akin to an orchid.