Rethinking Vaping All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center Vaping is on the rise. While e cigarettes don't contain tobacco, they may still contain many of the same toxic and cancer causing chemicals found in regular cigarettes. This includes: Acrolein (weed Vaping harmless. Chemicals like formaldehyde, arsenic, lead, chromium, and nickel are found in vape aerosol. They damage lungs. They harm developing brains. They raise cancer risks. Protect