Moffitt Cancer Center Studies How E Cigarettes Help Smokers Quit Moffitt DID YOU KNOW? While some may think vaping is a safer alternative, the reality is that e cigarette aerosol can include all or more of the harmful substances in cigarettes. Understanding the facts E cigarettes are not a healthier alternative to cigarettes. They contain nicotine and many harmful ingredients that can cause cancer and heart disease. Since these products are relatively new, we don't know all e Cigarettes Safety Not Yet Proven CANSA The Cancer Association of South Africa CANSA The Cancer Association of South Africa Prevalence of cigarette and e cigarette use among U.S. adults eligible for lung cancer screening based on updated USPSTF guidelines ScienceDirect