It's Not Just Cigarettes: Vape Residue Sticks on Surfaces Too Thirdhand Smoke Resource Center All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center Teen Health Info : Vaping everything you need to know Chemicals in vapes could be highly toxic when heated, research finds Vaping The Guardian Do you really know what's in your vape? There's no safe vape. Besides nicotine, vapes contain many other harmful substances. Formaldehyde, arsenic and lead have all been found inside common vapes.