human
I've heard a lot of people talk about the dangers of e-cigarettes. What are the dangers?
assistant
The main danger is that they can be addictive, and some people may find it harder to quit smoking cigarettes if they switch to using e-cigarettes. They also contain nicotine, which is highly addictive. E-cigarettes are not regulated by the FDA, so there is no way to know what chemicals or ingredients are in them. This makes it difficult to know whether they are safe or not.