Bootleg marijuana vapes produce vapor tainted with formaldehyde, tests show Testing has revealed what we already knew illegal vapes are filled with dangerous levels of addictive nicotine and laced with chemicals including formaldehyde and antifreeze components. The Health Effects of Vaping Indoors Indoor Doctor 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