What is an e cigarette? BBC Science Focus Magazine The dangers of electronic cigarettes Article The United States Army High resistance coils in E cigarettes increase heavy metals leaching into aerosols to cause oxidants generation in human bronchial epithelial cells at air liquid interface: A unique non animal methodological approach on vaping studies ScienceDirect The safest vape is the one you never start. Flavoured vapes were designed to feel harmless: Candy taste. Fruit smell. Cool packaging. Viral aesthetics. But your lungs don't care about the flavour.