E Cigarettes (Vapes) Smoking and Tobacco Use CDC Nicotine absorption from electronic cigarette use: comparison between first and new generation devices Scientific Reports 800 mg of nicotine = 40 packs of cigarettes. That's what's inside just one Geek Bar. Nicotine at these levels can: Harm brain development in youth Increase blood pressure and Vaping Equivalents: How Many Puffs of Vape Equal One Cigarette?