We break down the key differences between traditional cigarettes and e cigarettescovering: 1 Their compositions and ingredients. 2 The health risks associated with both. 3 Nicotine levels and addiction potential. 4 The impact Health effects and known pathology associated with the use of E cigarettes ScienceDirect Vaping vs. smoking: what are the risks? Pacific Life Re Nicotine absorption from electronic cigarette use: comparison between first and new generation devices Scientific Reports