Is Vegetable Glycerine Present in Elf Bars? A Closer Look at Disposable Vapes Vape Glycerin Our second topic on our Let's Talk Health Series is vaping. As a smoke The Best Dessert Flavored Disposables Ziip Stick Vape Pens that don't add Pg Vg Peg Is Vegetable Glycerin Safe to Vape? Find Out Now! Crystal Vape & Crystal Bar & SKE Vape Official Station Do you know what you're vaping? Propylene glycol (PG) and vegetable glycerin (VG) are the main liquids in vapes. When heated, these chemicals turn toxic and aren't safe to breathe.