An elf bar contains 0.5 milligrams of nicotine per puff, which is considered a low level of nicotine compared to other types of e-cigarettes. This makes it a good choice for those who are looking to quit smoking or reduce their nicotine intake. The nicotine in an elf bar is delivered through a small heating coil, which vaporizes the nicotine liquid and produces a vapor that can be inhaled. The nicotine is then absorbed into the bloodstream through the lungs, providing a nicotine fix without the harmful effects of smoking.