Because I have known food allergies and sensitivities I learned quickly that I have to watch vape juices as well. Few months ago I picked up 120ml bottle from silverback juice. Hit it a few times, thought something in it tasted odd and got nervous/ jittery. Looked closer to what I thought was grape flavored juice and turns out the odd taste was oatmeal. Oatmeal is one of the things I absolutely will not and cannot tolerate. 120ml bottle went straight to the garbage.
Don't handle anything with creme very well either. Had to throw away a few other juices that had creme in them.