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 Johns Hopkins researchers find thousands of unknown chemicals in electronic cigarettes Hub Inside the Vaper's Den: E Cigarette Salvation and New Dangers Presence of unknown chemicals in e cigarette found by Johns Hopkins researchers The Business Standard