Vaping or Smoking Which is More Dangerous for your Lungs? CritiCare Hospital Nothing good comes from smoking , and vaping isn't a safe alternative. E cigarettes often contain nicotine and other harmful substances, and studies show that young people who vape are more likely to E cigarettes contain hazardous substances, addictive and harmful What are the respiratory effects of e cigarettes? The BMJ E Cigarettes It Doesn't Matter What You Call Them E Cigarettes Found More Harmful Than Thought