Which brands contain diacetyl in their vape juices? Knowledge Kaiweili Digital Technology DYK? Vaping coats lungs with potentially harmful chemicals. This can include chemicals such as: Diacetyl: This food additive, used to deepen e cigarette flavors, is known to damage small passageways in the lungs. Vapes with Diacetyl List: Brands and Flavors to Avoid Do Crystal Bar Vapes Have Diacetyl? Vapor Shop Direct