What to Know About Electronic Cigarettes (E Cigarettes) JUUL Becomes Best Selling E Cigarette on the US Market E Cigarette Reviews and Rankings E Cigarettes Circulation SMOKO VAPE E Cigarette Review Old School Starter Kit But Good? A sweeping scientific review is raising new concerns about the long term health effects of vaping. Nicotine based e cigarettes may pose a serious cancer risk, according to a major new review that challenges the E cigarette use alters respiration but does not impair lung function, according to new findings