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, Which brands contain diacetyl in their vape juices? Knowledge Kaiweili Digital Technology Vaping Q& A: What is behind the illnesses tied to e cigs? cleveland.com E Cigarettes and Vaping PPAC Central Ah yesvaping studies saying they contain diacetyl. : r Vaping