Exploring the Impact of E cigarettes on Cardiovascular Health: Insights from Preclinical and Clinical Studies Cardiovascular Toxicology Springer Nature Link E cigarette flavors are toxic to white blood cells, warn scientists Anti Vape Campaign E Cigarettes: Know the Health Risks Department of Health 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.