C O R R E C T I O N The United States District Court for the Northern District of California Juul Gets Temporary Reprieve to Keep Selling Its E Cigarettes The New York Times JUUL electronic cigarette products linked to cellular damage UCR News UC Riverside Is Diacetyl In Juul Pods E Cigarettes 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.