E Cigarettes Are An Effective Way To Quit Smoking, Finds An Indian Study E Cigarettes, Vapes, and other Electronic Nicotine Delivery Systems (ENDS) FDA What is vaping? What are e cigarettes? Is it as harmless as it is made out to be? The truth is many e cigarettes contain nicotine, a highly addictive substance that can affect brain 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