Vapes vs Cigarettes: Which One is More Deadly? Atlus 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 E cigarettes and Vaping Commercial Tobacco Use MN Dept. of Health Vaping: Harmful to Your Health Tully Hill E cigarette flavors are toxic to white blood cells, warn scientists While vaping is not risk free, it is less harmful than tobacco Our World in Data