A Warm, Buttery Flavor and a Risk of Irreversible Lung Damage Diacetyl & Popcorn Lung EDGE Vaping Elf Bar Concern Over Diacetyl In Lost Mary E Cigarettes What Vape Flavors Contain Diacetyl Ah yesvaping studies saying they contain diacetyl. : r Vaping 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. Some E Cigarette Flavors May Be More Harmful Than Others The Atlantic