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. Diacetyl in E Cigarettes, Should You Be Worried? E Cigarette Reviews and Rankings Vaping safe. Know what's inside. Protect their future. TalkNowAZ.com What Vapes Contain Diacetyl and How Can We Stay Safe? , The notion that vaping causes "popcorn lungs" due to diacetyl in e liquids is based on outdated information.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 Vaping, Diacetyl, and Popcorn Lung: Is the Threat Real?