human
I've heard a lot about the dangers of e-cigarettes. Is there any evidence that they are harmful?
assistant
The jury is still out on whether or not e-cigarettes are harmful to health, but there is some research that suggests that they may be more dangerous than traditional cigarettes. Studies have found that e-cigarettes contain higher levels of toxic chemicals and carcinogens than regular cigarettes, and that they can expose users to more nicotine than intended. In addition, many people who use e-cigarettes also smoke regular cigarettes, which can increase their risk for lung cancer and other diseases.