E cigarette flavored pods induce inflammation, epithelial barrier dysfunction, and DNA damage in lung epithelial cells and monocytes Scientific Reports A Kernel of Truth: Diacetyl, Popcorn Lung and E Liquids Dinner Lady Do Juul Pods Have Diacetyl The Dangers of Juuling 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.