Study Measures the Effects of JUUL Vaping on Users and their Surrounding Environment Thirdhand Smoke Resource Center Virginia Tobacco JUUL 2ct Pods 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. Juul Settles Multistate Youth Vaping Inquiry for $438.5 Million The New York Times