Popcorn Lung: The Deadly Secret in Your Vape! Did you know that the sweet, tempting flavor in your e liquid could be hiding a chemical called Diacetyl? This chemical, which tastes Popcorn lung: how vaping could scar your lungs for life Health experts are sounding the alarm about a serious condition linked to vaping, known as "popcorn lung" or bronchiolitis obliterans. This irreversible lung disease is caused by harmful chemicals, like diacetyl, found Is There A Link Between E Cigarette Use And 'Popcorn Lung'? Does Vaping Cannabis Cause Popcorn Lung? HelloMD