In recent years, the number of e cigarette users worldwide has sharply increased, with many believing that vaping is less harmful than smoking traditional cigarettes. However, health experts are warning of its negative How E Cigarettes Affect Your Body E Cigarettes and Pregnancy Maternal Infant Health CDC Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Vaping releases toxic chemicals, including heavy metals, as well as ultrafine particles that go deep into the lungs. These increase the risk of heart and lung disorders. Researchers Find Toxic Metals in E Cigarette's Johns Hopkins Bloomberg School of Public Health