I just started vaping & I've noticed there is a vast variety of vape products and sites out there. And the common factor I notice with the flavor selections, is that they are "concentrated". Which got me wondering: Can I use any type of concentrated flavor, extract, or oil in my vape? Or does it have to be very specific? For example, say I wanted to add Peppermint oil to increase the mint flavoring in my cartridge... (One of the flavor components found in some menthol analogs.) Would it be at all possible and/or safe to do so? I kind of have the urge to experiment with some candy or vanilla extracts. I'm just not sure if those can be vaped.