Juul Settles Multistate Youth Vaping Inquiry for $438.5 Million The New York Times JUUL Design Life Cycle Juul vs. FDA, What's the buzz about? The Chatterbox Study Measures the Effects of JUUL Vaping on Users and their Surrounding Environment Thirdhand Smoke Resource Center 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.