Vaping, Diacetyl Lawsuits In New York State Grandelli Law , The notion that vaping causes "popcorn lungs" due to diacetyl in e liquids is based on outdated information. , ., While diacetyl was once used as a flavoring agent in some e liquids and linked to Understanding Popcorn Lung and Diacetyl: Risks and Prevention Vapestore Blog elf bar vape uk Diacetyl: Is it a danger for the e liquid? Our expert advice! 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