Fumot Vape Diacetyl Vaping, Diacetyl, and Popcorn Lung: Is the Threat Real? What Vapes Contain Diacetyl and How Can We Stay Safe? 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: 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