Abstract: E-cigs are on the market more than 10 years, most smokers tried it and keep smoking cigarettes because 99% smokers cannot get satisfaction from vaping due to inhaling not oxidized nicotine vapor, people been smoking for 5 thousand years, put tobacco in pipe/cigs and burn/combust it to get buzz, the active ingredient in the inhaled tobacco smoke is oxidized nicotine. after scientist and doctors discovered cigarette smoking causing cancers and vaping then invented to prevent inhaling harmful smoke produced by combustion of the tobacco plant material, but vaping cannot satisfy smokers due to vaping cannot producing oxidized nicotine as smoking does.