JUUL The Smoking Alternative, unlike any E Cigarette or Vape What Does A JUUL Really Do To Your Body? Franciscan Health JUUL Lawsuits Addiction, Lung Damage and Other Vaping Injury Lawyers 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. Geek Bar Flavor Chart Pulse