A comprehensive review of recent peer reviewed research provides the strongest evidence to date that using electronic cigarettes likely causes both oral and lung cancers in humans. https: modernsciences.org vaping likely causes oral lung cancer april The research looked at the chemical composition of "vape smoke" and assessed its cancer risk using data from published animal studies. Read more The Side Effects and Cancer Risk Associated with Vaping Broad evidence implicates e cigarettes as a cause of cancer Stanton Glantz blog