E Cigarettes (Vapes) Smoking and Tobacco Use CDC Vapes vs Cigarettes: Which One is More Deadly? Atlus What's in an E Cigarette? American Lung Association 2020 Update: Is Vaping More Dangerous Than Smoking? 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 Cytotoxic and oxidative effects of commercially available propylene glycol (PG) and vegetable glycerin (VG): Common humectants in electronic cigarettes ScienceDirect