Vaping May Increase Respiratory Disease Risk by More Than 40 Percent SPH E Cigarettes and Pregnancy Maternal Infant Health CDC The Hidden Dangers: E Cigarettes, Heated Tobacco, and Their Impact on Oxidative Stress and AtherosclerosisA Systematic Review and Narrative Synthesis of the Evidence The Dangers of Vaping Oral Health Perspective Vaping has become common, but it's important to know what you're inhaling. Many e cigarettes contain nicotine, heavy metals like nickel and lead, and chemicals that can harm your lungs and overall health.