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 E cigarettes 'are much safer than normal cigarettes, with a very low risk' says study The Mirror E cigarettes have public health benefits: Royal College of Physicians The evidence keeps piling up: e cigarettes are definitely safer than smoking Science The Guardian E Cigarettes and Vaping PPAC Central