Does Vaping Cause Lung Cancer? Myths and Facts OncoDaily Some reports state that these new, flavored smoking devices are less harmful than tobacco cigarettes but how safe is vaping? In this third part of a four part series, China Daily examines the Vaping harms your health Cancer Institute NSW 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 Vaping: The Health Risks and How to Quit HelpGuide.org