Vaping is often seen as a less harmful alternative to smoking, but since it is still relatively new, there is no way to study the long term effects. Both vaping and smoking irritate Vapes don't produce harmless water vapor. They can contain addictive nicotine, cancer causing chemicals like acetaldehyde and formaldehyde, as well as heavy metals that don't belong in your body. Live Vape Free is Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Is Formaldehyde In Cigarettes Clearing The Air: Do Vapes Still Contain Formaldehyde Cigarettes Vs Vape Australia Is vaping more dangerous than smoking? UK Addiction Treatment Centres