E cigarettes as a smoking cessation tool Cancer Research UK (2018) Protective cells in the lungs of ex smokers could explain why quitting smoking reduces the risk of developing lung cancer later in life. Stopping smoking completely is the best thing you can do Study title Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis E cigarettes around 95% less harmful than tobacco estimates landmark review GOV.UK Disposable e cigarettes are now more toxic than traditional cigarettes, researchers say The Independent