Does the e-cigarette contain nicotine?

Nicotine content inhaled in each cigarette: 

a cigarette can smoke 10 to 15 mouthfuls, usually the nicotine content of cigarettes ranges from 0.5 mg to 2.4 mg. A cigarette takes about 15 puffs, Then the nicotine content inhaled in each mouth: 

- When the nicotine content of a cigarette is 1.6 mg: 1.6/15=0.107 mg 

- When the nicotine content of a cigarette is 0.5 mg: 0.5/15=0.033 mg 

Nicotine content inhaled in each mouth of an electronic cigarette: The weight of 1 ml of cigarette liquid is equivalent to the nicotine concentration in 1 g of electronic cigarette liquid (based on 1 g, i.e. 1000 mg): 

- 16 mg (i.e. 1.6%) - 11 mg (i.e. 1.1%) 

- 6 mg (i.e. 0.6%) - 0 mg (i.e. 0%) 

According to the different nicotine content of the cigarette liquid, One 1ml cigarette liquid can smoke 300 mouthfuls, so the nicotine content inhaled in each mouthful of electronic cigarette:

 - For high concentration: 16mg -- 16/300=0.05mg

The nicotine content of cigarettes with the same concentration is 0.107mg/mouthful, while that of electronic cigarette is 0.05mg/mouthful. This proves that even considering the nicotine problem, the content of electronic cigarette is much smaller than that of cigarettes. Besides, a small amount of nicotine is harmless to the human body and can be metabolized, Or if you really have concerns about the nicotine contained in the electronic cigarette, you can choose the nicotine free liquid cigarette.

Through the above comparison, I believe you have an obvious answer to the question of how to choose between electronic cigarettes and cigarettes