How E Cigarettes Affect Your Body Vaping To Quit Smoking? All Your Questions Answered! E cigarettes nearly twice as effective as other nicotine replacement therapies at helping smokers quit Stop Smoking E Cigarettes CardioSmart American College of Cardiology Vaping is not replacing smoking. It is often added to it. This is called dual use. Nearly half of e cigarette users still smoke cigarettes. What this means: Smoking continues alongside vaping E cigarettes may help smokers quit even if they don't intend to, study finds UPI.com