E cigarettes more helpful than nicotine replacement treatments for dependent smokers Queen Mary University of London The nicotine in 1 vape can equal 50 cigarettes. Depending on the size of the vape and nicotine strength, it can be much higher. Nicotine can harm the developing brain, affecting Common ecigarette (ecig) products and associated toxins. Download Scientific Diagram Are E Cigarettes the Right Choice? SiOWfa15: Science in Our World: Certainty and Controversy