A Kernel of Truth: Diacetyl, Popcorn Lung and E Liquids Dinner Lady The real dangers of long term vaping are just being realized. If you vape quit now. Vapes contain poison. Many vape liquids contain toxic chemicals (like formaldehyde, acetaldehyde, diacetyl, and heavy 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. There are still aromas flavors that still have diacetyl? Been reading about it, say's that TFA released a diacetyl free version. Order this one a few months ago and found out about DX