Vaping Forward South Bronx Coalition E cigarette flavors are toxic to white blood cells, warn scientists Exploring the Impact of E cigarettes on Cardiovascular Health: Insights from Preclinical and Clinical Studies Cardiovascular Toxicology Springer Nature Link Health effects and known pathology associated with the use of E cigarettes ScienceDirect NHMRC delivers assessment on electronic cigarettes Lung Health Promotion Centre 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.