While vaping is not risk free, it is less harmful than tobacco Our World in Data 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 Psychiatry.org Vaping is Unhealthy. Tips and Resources to Help Quit. A viral simulation comparing the effects of smoking and vaping has reignited debate over the long term health risks of both habits. The demonstration visually shows how cigarette smoke leaves thick tar buildup