C O R R E C T I O N The United States District Court for the Northern District of California Diacetyl In Juul Pods Juul Pods 6pk Case Diacetyl in Vape Juice: The Facts We Know Pod Salt UK 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.