human
I've heard that a lot of people are switching from traditional cigarettes to electronic cigarettes. Is there any evidence that these are healthier?
assistant
There is some evidence that e-cigarettes are less harmful than regular cigarettes, but it’s still unclear how much less harmful they are. Some research suggests that e-cigarettes may be safer for smokers who switch completely, since they don’t contain the same cancer-causing chemicals as regular cigarettes. But other studies suggest that e-cigarettes may still be bad for your health, because they can still expose you to nicotine and other harmful chemicals.