Vaping, Diacetyl, and Popcorn Lung: Is the Threat Real? Vaping360 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. Why Vape It? Poster NIMCO, Inc. E Cigarettes and Vaping PPAC Central How do I figure out if my vape juice contains diacetyl or not? : r Vaping