E-cigarettes: Teens 'should not be using them at all'

A new study confirms that e-cigarettes are harmful to teenagers and urges adolescents to stop putting their health at risk.

They offer users a similar sensation to smoking, but they do not produce smoke. Instead, they heat up the e-liquid they contain and create vapor, which is why using these devices is sometimes referred to as "vaping."

However, while many adult users opt for e-cigarettes to ease themselves out of their smoking habit, some researchers have raised concerns that teenagers may be using them as a gateway into this very habit.