E cigarettes 'significantly less harmful' than smoking and can even help people quit, research reveals Wales Online FDA nicotine rule could make cigarettes less addictive. That scares me Reasons for use of e cigarettes Tobacco Use in Canada University of Waterloo 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