Smoking Women: Rising Trends and Health Impacts SMOKO E Cigarettes Heated Tobacco Products, Cigarettes, and E Cigarettes: What's the Difference PMI Science Vaping: Is It Harmless? Family Dentistry and Orthodontics Dental Group of Amarillo Amarillo, TX Smoking vs. Vaping: What You Need to Know The Vape Mall Propylene glycol, a component of electronic cigarette liquid, damages epithelial cells in human small airways Respiratory Research Springer Nature Link Scripps Health E cigarettes remain the most commonly used tobacco product among middle and high school students in the United States, according to the Instagram