Vaping Safety, Smoking, Dangers, Pros, Cons, Debate, E cigarettes, & Tobacco Britannica Vaping isn't harmless. Early nicotine use can harm brain development, affect how nerve cells work, and increase the risk of addiction. Young people who vape are 4x more likely to start smoking Analysis suggests e cigarette use may be linked to lower rates of smoking Teenagers who vape sweet flavoured e cigarettes more likely to stick with habit, study claims The Independent The Independent