Some E Cigarette Flavors May Be More Harmful Than Others The Atlantic 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. Flavors that contain diacetyl according to OSHA (OSHA, 2010). Download Table What Vapes Have Diacetyl? 2025 List & Safe Alternatives Popcorn Lung: The Deadly Secret in Your Vape! Did you know that the sweet, tempting flavor in your e liquid could be hiding a chemical called Diacetyl? This chemical, which tastes