Can Vaping Cause Lung Cancer or Other Diseases? Essentia Health Vaping is often marketed as a safer alternative to smoking, but many vape products contain nicotine, harmful chemicals, and heavy metals that can harm developing brains and lungs. E Cig Vapor vs. Tobacco Smoke: Which Is More Harmful? White Cloud White Cloud Electronic Cigarettes How Switching to E Cigarettes After Smoking Cessation Affects Lung Cancer Risk The evidence keeps piling up: e cigarettes are definitely safer than smoking Science The Guardian E Cigarettes (Vapes) Smoking and Tobacco Use CDC