E cigarettes contain hazardous substances, addictive and harmful E cigarettes don't need nicotine to be toxic Bigger, stronger, and cheaper: Disposable e cigarettes have more nicotine and are more accessible than ever E Cigarette How E Cigarettes Work, Health Risks & Teen Use E Cigarettes, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA As e cigarette use grows, more research needed on long term effects of vaping American Heart Association