Vaping has been associated with severe lung injury More than 2,000 people with e-cigarette or vaping product use-associated lung injury (EVALI) have been hospitalized this year. Most of these patients were aged 18 to 24 years. Investigations are ongoing to better understand EVALI and it seems there may be more than one cause. What’s Actually in your Vape Juice? Flavorings added to vape juice are FDA approved for consumption, but not inhalation. WebMD shares what's really in your vape and it includes Nicotine, Propylene glycol, Formaldehyde, Glycerin, Lead and Nickel. Engineered to be More Addictive The amount of nicotine in one standard JUUL pod is roughly equal to the amount of nicotine in a pack of cigarettes, or about 200 puffs. Learn more at the Truth Initiative. Exploding Devices E-cigarettes or vapes sometimes explode and can cause serious injuries. The cause of exploding devices is not yet known. Even those that appear to be in good condition and have not shown any problems have exploded spontaneously.