Though little is still known about the long-lasting effects of electronic cigarettes, they are often peddled as less harmful versions of cigarettes or as an effective form of helping smokers to quit.
This is because e-cigarettes simulate the feeling of smoking but don't actually burn tobacco.
Instead, smokers consume aerosol vapours.
But, according to a study published by Environmental Health Perspectives today, it turns out that e-cigarettes may actually pose their own health risks.
The study draws attention to a certain chemical that is identified in over three quarters of e-cigarettes currently on the market.
This chemical is called Diacetyl and is linked to a number of serious respiratory conditions including lung cancer.
Not only this, but apparently e-cigarettes contain other harmful ingredients such as formaldehyde.
This is definitely not good news for the industry.