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 Teen Health Info : Vaping everything you need to know About E Cigarettes (Vapes) Smoking and Tobacco Use CDC