The Health Effects of Nicotine Use on the Brain and Body What Does Vaping Do to Your Brain? University of Nevada, Reno Smoking, Tobacco, E Cigarettes and Oral Health Growing Smiles The Harmful Health Effects of Vape Use Advanced DDS 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.