E cigarettes almost always contain nicotine. Vaping can expose you and others around you to harmful chemicals, such as: Do Juul Pods Contain Formaldehyde It's not just vapor. Your vape could contain the same amount Formaldehyde Higher in E Cigarettes than Previously Reported, say researchers Chemical Free Life 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 Formaldehyde levels in e cigarettes were previously 'underestimated', researchers find The Pharmaceutical Journal Opinion The Formaldehyde in Your E Cigs The New York Times