They may seem sweet and tasty, but each time you vape, you breathe in harmful chemicals. One of these chemicals is diacetyl, used in popcorn flavourings for its buttery taste. When eaten, Vape Flavors and Vape Juice: What You Need to Know Johns Hopkins Medicine What's In Your Vape Juice? E Liquid Ingredients Explained EDGE Vaping worried about the Popcorn Lung diacetyl rumour (please read) Vaping Forum Planet of the Vapes Enjoy Serene Vaping With Diacetyl Free Max VG E Juice Velvet Cloud , The notion that vaping causes "popcorn lungs" due to diacetyl in e liquids is based on outdated information.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