E cigarettes Contain Dangerous 'Popcorn Lung' Chemicals Does E Cigarette Contain Tobacco IQOS 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 found by Harvard scientists to contain toxic chemical linked to lung disease IBTimes UK E Cigarettes May Have Cardiopulmonary Effects On Teenager Vape Groups Scientists Claim My Vape Review E Cigarettes Contain '10 Times More Carcinogens Than Regular Tobacco' IBTimes UK