JUUL LABS ACTION PLAN Juul Labs Juul Device With USB Charging Dock Juicefly E cigarette flavored pods induce inflammation, epithelial barrier dysfunction, and DNA damage in lung epithelial cells and monocytes Scientific Reports Juul Gets Temporary Reprieve to Keep Selling Its E Cigarettes The New York Times 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.