E cigarettes are likely to cause cancer, including in the lungs and mouth, according to a sweeping review of scientific evidence that challenges their positioning as a safer alternative to smoking. There is E cigarettes are not a healthier alternative to cigarettes. They contain nicotine and many harmful ingredients that can cause cancer and heart disease. Since these products are relatively new, we don't know all Youth Know the Risks elfbar nachfll pod luft aus Dangers of Vaping: Why E Cigarettes Are Harmful to Health Tobacco and Cancer Cancer CDC