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 Teen vaping linked with toxic lead exposure, study finds CNN Vaping Devices (Electronic Cigarettes) DrugFacts National Institute on Drug Abuse (NIDA) E cigarette, or Vaping Product, Use Associated Lung Injury (EVALI) Fact Sheets Yale Medicine