3 ms·

You can look at the wikipedia article for nicotine. Apparently it promotes cancer.

• Symmetry 14y ago
  When talking about the ability of substances to cause cancer it's always important to talk quantitatively, because there are a huge number of things that cause cancer and most have effects too subtle to worry about. In the case of nicotine it may cause cancer in humans at the levels smokers experience, but even so it's way less carcinogenic than alcohol, for example. Smoke of all sorts, on the other hand, is horribly carcinogenic and you can make a good argument for banning wood-burning stoves in cities.
• LnxPrgr3 14y ago
  As they say, the dose makes the poison. So far, I don't see any evidence that exhaled e-cigarette vapor contains more than a trivial amount of nicotine. That nicotine could be a hazard for the user, but as far as I can tell you'd have a hell of a time getting a significant dose from passive vaping. If you're looking to avoid even trace amounts of nicotine, staying away from smokers isn't enough. You should probably avoid eating anything in the nightshade family (e.g. eggplant, tomatoes, potatoes, and peppers). It's worth noting these foods contain other toxic alkaloids in low doses too—other parts of the plants with higher concentrations are inedible. The relevant question here is this: is exhaled vapor from nearby e-cigarette users a significant health risk? How does it compare to other environmental hazards?