Electronic cigarettes emit toxic compounds but how much do they harm the body? Techno FAQ 5 Vaping Facts You Need to Know Johns Hopkins Medicine Perspective on E Cigarettes vs. Standard Cigarettes Tobacco Free Florida Know the facts about e cigarettes 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