FDA clears first menthol e cigarette for adults E cigarette use to reduce cigarette smoking may not increase nicotine dependence Penn State Health News An updated overview of e cigarette impact on human health Respiratory Research Springer Nature Link Study reveals how salt based nicotine and menthol flavors influence e cigarette use in young adults E cigarettes could be available on NHS to tackle smoking rates E Cigs Vapes & Pod Based Tobacco Prevention Toolkit Stanford Medicine