........ Some extracts, like Vanilla, often have PG or VG, Alcohol and pure extract, which is okay, but if there's anything else, I'd skip it and move on to something else. ........
I'll second that, and most of the vanilla extracts have corn syrup. I've just been trying some Rawleigh vanilla and it was a no go. It lists corn syrup as an ingredient but doesn't say how much. I was hoping there wasn't enough to make a difference but it proved to be a coil gunker, big time. It was delicious but I won't be using any more of it.
I may try the Watkins. It lists glucose which is a sugar but it might not be added sugar, just what's from the alcohol and vanilla bean itself (I'm probably just hoping against hope here lol).