Vape Juice Vape Dojo 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. You've seen the device. But do you know what's actually inside it? Every disposable vape has 4 components and each one comes with real risks: Nicotine e liquid: toxic chemicals, including lead Hazardous chemicals discovered in flavored e cigarette vapor Vape Flavors and Vape Juice: What You Need to Know Johns Hopkins Medicine