The episode tries to have it both ways, but it's too ridiculous to be anything but Frohike's paranoid conclusions based on a trashy fiction magazine, and yet has too much detail, and the camera lingers on the Cancerman too much, for it not to be his recollections
First, flavor chemicals are often used in e-liquids without safety data at concentrations much higher than those found in other consumer products
When someone attempts to quit smoking, they may experience a range of withdrawal symptoms as their body adjusts to the absence of nicotine
A recent study conducted by the National Academies of Sciences, Engineering, and Medicine found that people who use e-cigarettes may be inhaling dangerous levels of heavy metals like lead and nickel, which is a concern that conventional cigarette smokers also face
3 Think You Know All the Chemicals Found in Cigarettes