PSA: vaping at high voltages produces high levels of a carcinogen The Verge First genome wide comparison of vapers and smokers finds similar DNA changes linked to disease risk Vapes and e cigarettes often contain nicotine, heavy metals, and carcinogensand can harm developing brains, affect mood and learning, and lead to lasting lung damage. Just one hit can start an addiction. E Cigarettes Increase Risk of Lung and Bladder Cancer More Than Traditional Cigarettes Oncology Nursing Society