Many smokers are using E-vapor products as alternatives to conventional cigarettes, because there are lower amounts of aerosols delivered by EVPs . There was a study conducted to evaluate the release of vapor-phase chemicals in exhaled breath and in a room of cigarette smoke. The study was designed to compare the level of each chemical between baseline and the product used indoors. It measures the changes in the level of nicotine, PG, glycerol and certain baselines. In the study, thirty-seven adults who are E-vapor or conventional smokers were examined. The study participants had to be in relatively good health and between the age of 21 and 65 years. They were separated into four groups, each inhaling and exhaling different amounts of E-vapor
