Impact of Atomizer Age and Flavor on Toxicity of Aerosols from a Third-Generation Electronic Cigarette against Human Oral Cells.

Electronic cigarettes (ECs) are categorized into generations which differ in terms of design, aerosol production, and customizability. Current and former smokers prefer third-generation devices that satisfy tobacco cravings more effectively than older generations. Recent studies indicate that EC aerosols from first- and second-generation devices contain reactive carbonyls and free radicals and can cause cytotoxicity.