What are the respiratory effects of e cigarettes? The BMJ 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. CHEST A new research statement published in the May 2026 issue of the journal CHEST identifies four research questions regarding e cigarette Instagram E Cigarettes and Pregnancy Maternal Infant Health CDC E cigarettes linked with blood vessel damage National Institutes of Health (NIH) E cigarette risk perceptions an American crime scene The Counterfactual