What Vapes Have Diacetyl? 2025 List & Safe Alternatives Diacetyl Free Vapes Knowledge is power! Early College High School is leading the charge in our district wide mission to keep students safe, healthy, and informed about the dangers of vaping. These Diacetyl notice! : r Vaping 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.