Vaping, Diacetyl, and Popcorn Lung: Is the Threat Real? Vaping360 A Kernel of Truth: Diacetyl, Popcorn Lung and E Liquids Dinner Lady What is Popcorn Lung? Popcorn Lung is a serious, permanent lung disease caused by inhaling harmful chemicals like diacetyl, sometimes found in flavored vapes. Tips for Parents & Caregivers: Talk Vapes can contain harmful chemicals, such as diacetyl and heavy metals. They just don't put it on the pack. Do you know what you're vaping? Get the facts at nt.gov.au vaping Cancer Council