Studies comparing the amount of carcinogenic compounds inhaled from cigarette smoke and e-cigarette aerosol show that mainstream cigarette smoke contains 52 carcinogens. In contrast, only 2 such substances have been identified in e-cigarette aerosol.
The carcinogenic potential of these substances varies depending on their type. The International Agency for Research on Cancer (IARC) has classified carcinogenic compounds into the following categories based on their harmfulness:
- Group 1: Proven to be carcinogenic to humans
- Group 2A: Probably carcinogenic to humans
- Group 2B: Possibly carcinogenic to humans
Cigarette smoke
- 9 Group 1 carcinogens
- 9 Group 2A carcinogens
- 34 Group 2B carcinogens
E-cigarette aerosol
- 1 Group 1 carcinogen
- 1 Group 2B carcinogen
Furthermore, the concentration of these carcinogens in e-cigarette aerosol is several to dozens of times lower than in cigarette smoke.
Source: “1500 Times Less” by A. Sobczak.
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