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 New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking Vaping vs Smoking Vaping Less Harmful? Vape Direct Can Smoking and Vaping Cause Back Pain? National Spine Health Foundation