Smoking vs Vaping Which Is Worse For Your Skin? Does Vaping Cause Lung Cancer? 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 Did you know that just one drop of vape liquid is equivalent to smoking 15 sticks of cigarettes, which can be more harmful to the body? To know more about the other