How E Cigarettes Affect Your Body Are they safe to inhale?': Vaping liquids in Canada contain potentially harmful chemicals, tests show CBC News 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 Caption: You might see flavor. Your body sees chemicals. Vapes can contain: Nicotine (highly addictive) Heavy metals (like lead) Harmful chemicals that can affect your lungs Just because it Understanding the Hidden Health Risks of Vaping UL Research Institutes Vaping and Electronic Cigarette (E Cigarette) Products Cattaraugus County Website