Cardiopulmonary Impact of Electronic Cigarettes and Vaping Products: A Scientific Statement From the American Heart Association Circulation A 2026 scientific review linked vaping to lung and oral cancer related cellular changes, including DNA damage, oxidative stress, and inflammation in human tissue samples. E cigarette aerosol contains nicotine derived nitrosamines, volatile organic Health effects of electronic cigarettes Wikipedia E cigarette smoke damages DNA and reduces repair activity in mouse lung, heart, and bladder as well as in human lung and bladder cells PNAS Evaluation of DNA damage through cytogenetic approach in smokers and vapers with and without nicotine compared with control group Bionatura journal