It depends on whether they are the natural line or not. At Michael's I would guess it's the oils that are ful of artificial ingredients and should not be vaped. They are used for making candy and scented candles. I would recommend buying flavors from Wizard Labs or Totally Wicked online. Wizard carries LoRann and The Flavor Apprentice, among a few others- all top quality.
I just found a website that gets into the nitty gritty about different flavor companies and the ingredients they use. They differentiated a "green" line from LoRann's other lines as being the only one safe to
vape. I haven't read
through the site yet, but I'm about to. It looks very informative and thorough. Here's a link:
Best Lorann Oils Vaping Spreadsheet - 2013 | Best Vapor Flavors I hope works. If it doesn't, the site is thebestvaporflavors.com