Is Formaldehyde in Vapes? Sikary Vape Official Website Formaldehyde levels in e cigarettes were previously 'underestimated', researchers find The Pharmaceutical Journal 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 Do Juul Pods Contain Formaldehyde It's not just vapor. Your vape could contain the same amount E cigarette aerosols contain many dangerous metals and chemicals things that our lungs were never meant to inhale. One such chemical you might not be aware of is formaldehyde, which can be released as E cigarettes almost always contain nicotine. Vaping can expose you and others around you to harmful chemicals, such as: