DYK? Vaping coats lungs with potentially harmful chemicals. This can include chemicals such as: Diacetyl: This food additive, used to deepen e cigarette flavors, is known to damage small passageways in the lungs. How Many Puffs Are in a JUUL Pod? Here's the Real Answer Inline Vape LLC Vaping Student Health & Well Being Juul e cigarettes were banned in the U.S. What are the vaping rules in Canada? The Globe and Mail Nicotine formula used by e cigarette maker Juul is nearly identical to the flavor and addictive profile of Marlboro cigarettes : r science JUUL: Side effects and health risks