Metals found in disposable e cigarette vapor could pose health risks American Chemical Society Vaping Harmless. Vape aerosol contains toxic chemicals like formaldehyde, arsenic, lead, chromium, and nickel. They damage lungs. They harm developing brains. They raise cancer risks. We What's Actually in Your Vape: A Complete Chemical Breakdown Researchers Find Toxic Metals in E Cigarette's Johns Hopkins Bloomberg School of Public Health Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis