Is the Flavoring in E-liquid safe? Are there any studies?

[whiskey]

I could eat your dog up!!! Gorgeous.
OMG, I quoted my own post. Meant to edit...
Must be the flavorings.....

Bet My Dog Would Like To Meet Buttercrunch's Dog Ha Ha Sooo Coool!
Didn't Hear That About The Butter Flavor, It's One Of My Favorites
Maybe I'll Stay Away From The Butter Flavor Baking Stuff @ Michaels..But Lorann's
I'll Still Use In Small Drops