The Effects and Safety of Propylene Glycol & Vegetable Glycerine Pod Salt UK 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. Can fruit flavored nicotine vapes be safe despite their appeal to kids? , , The FDA recently granted approval for a company to market mango, blueberry, and menthol flavored vapes, despite concerns Safest Vape To Quit Smoking What Is The Safest Type Of Weed Vape Pen For Thc Australia Elf Bar