human
I've heard a lot of people talk about the dangers of e-cigarettes. What are the dangers?
assistant
The most common danger is that they can contain nicotine, which can be addictive and harmful to your health. They also can contain other chemicals, such as diacetyl and acrolein, which have been linked to cancer in animals. And because they are so new, there isn’t enough research yet on the long-term effects of vaping.