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 e cigarette craze highlights the dangers of flavored tobacco FDA Approves Juul's Tobacco and Menthol E Cigarettes FDA officially bans Juul e cigarettes in the U.S.: Here's why nj.com