Hidden Formaldehyde in E Cigarette Aerosols New England Journal of Medicine Staggering' contents of vapes revealed Yahoo News Australia Vapes: real facts The Real Cost Does Vaping Harm Eyesight: Effects of E Cigarettes on Vision La Jolla, CA Del Mar, CA GW Eye Associates 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 E cigarettes emit very high formaldehyde levels only in conditions that are aversive to users: A replication study under verified realistic use conditions ScienceDirect