What is Diacetyl? According to Wiki this is the breakdown of what Diacetyl. Most E-juice companies have taken care in buying Diacteyl free concentrates I do when making my own e-juice. I found a bad ass video that helps break the information down. There is a lot of information out there you could read for days. the info-graph shows a few a few myths about vaping. Source If you want more information on other vaping myths hit me up and we can research them out for you.