Vaping: Safe? Or Are Your Lungs Going Up In Smoke? Vaping delivers heated chemicals directly into the lungs. Unlike air, vape aerosols contain fine particles, nicotine, heavy metals, and flavoring compounds that were never designed to be inhaled. Once inside the chest, Comparative Lung Experiment: Vaping vs. Cigarettes Mechanical Health experts warn that flavored e cigarettes may lead to permanent lung damage. A U.S. teenager was diagnosed with "popcorn lung" after covertly vaping for three years, resulting in a lifelong, Vaping or Smoking Which is More Dangerous for your Lungs? CritiCare Hospital The Difference Between Healthy Lungs and Smoker's Lungs