Vaping exposes users to toxic metals like lead and uranium, study says E cigarette, or Vaping Product, Use Associated Lung Injury (EVALI) Fact Sheets Yale Medicine E Cigarettes and Vaping OHSU Researchers Find Toxic Metals in E Cigarette's Johns Hopkins Bloomberg School of Public Health 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