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 Is There Diacetyl In E liquid? Vaped Vaping Student Health & Well Being In Cigarettes Or Did You Know Some Flavored Vapes Contain Diacetyl, A Bronchiolitis Obliterans Vaping What Vapes Contain Diacetyl and How Can We Stay Safe? Did you know some flavored vapes contain diacetyl, a chemical linked to popcorn lunga rare, irreversible lung disease? It scars the small airways, making it hard to breathe. Symptoms can mimic