Evidence update on the cancer risk of vaping e cigarettes: A systematic review New study shows vaping is lethal The Citizen E cigarettes May Be Causing Depression, Heart Disease Sigaretta elettronica, gli studi non dimostrano che causa infarto o ictus The rise of teen vaping is worrying doctors worldwide. While e cigarettes were once marketed as a safer alternative, research shows they contain nicotine, heavy metals, and cancer causing chemicals that can damage developing E cigarette use linked to heart trouble: study, ETHealthworld