Vaping refers to the act of inhaling and exhaling aerosol, often called vapor, produced by an electronic cigarette or similar device. These devices heat a liquid that usually contains nicotine, flavorings, and INFOGRAPHIC: How Dangerous Are E Cigarette Ingredients? E Cigarettes Infographic Health and Care Vapes might be less harmful than traditional cigarettes and might help smokers quit smoking, but they are not safe, especially for individuals younger than 25 years old. Plus, much is still unknown