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 cigarette vapour contains two cancer causing chemicals, study says Use of e cigarettes after quitting smoking increases lung cancer risk Cancerworld Magazine E Cigarettes and Associated Health Risks: An Update on Cancer Potential L'Institut National du Cancer : la e cig, une solution pour arrter de fumer Vaping Possible Negative Effects on Lungs: State of the Art From Lung Capacity Alteration to Cancer Cureus