Vaping cannabis found to expose lung cells to toxic and cancer linked substances Vapes don't produce harmless water vapor. They can contain addictive nicotine, cancer causing chemicals like acetaldehyde and formaldehyde, as well as heavy metals that don't belong in your body. Live Vape Free is Can Vaping Cause Lung Cancer? Here's What We Know. Breast Cancer & E Cigarettes: Is Vaping a Safer Alternative to Smoking? Maurer Foundation FDA warns Juul, says it marketed vapes as less harmful than regular cigarettes without agency authorization The Washington Post FDA plans to ban all Juul vape products