Comment by c_hagau

As stated by a sibling comment, at least the carcinogenicity part isn't true. Unfortunately, even nicotine gum should be carcinogenic (and is of course not intended to be used for consumption besides of alleviating withdrawal effects).

Presence of the Carcinogen N′-Nitrosonornicotine in Saliva of E-cigarette Users: <https://pubs.acs.org/doi/10.1021/acs.chemrestox.8b00089>