Electronic cigarette

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![National Institute on Drug Abuse director Nora Volkow discussing a study that shows teens using e-cigarettes are more likely to start smoking tobacco.[54]](/uploads/202502/11/-Teens_Using_E-cigarettes_More_Likely_to_Start_Smoking_Tobacco.ogv2043.jpg)
An electronic cigarette or e-cigarette is a handheld electronic device that vaporizes a flavored liquid. The user inhales the vapor, which is called vaping. The fluid in the e-cigarette, called e-liquid, is usually made of nicotine, propylene glycol, glycerine, and flavorings.