Vaping can have serious negative impacts on both your lungs and your overall health. Here are the potential risks that we already know about, even if the vape is nicotine free: Does Vape Juice Expire? Tips to Preserve Your E Liquid Generation V Vaping the sweetener sucralose may produce toxic chemicals 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. Is Vaping Making People Sick? Officials Warn of New Risks UPMC