The rise of teen vaping is worrying doctors worldwide. While e cigarettes were once marketed as a safer alternative, research shows they contain nicotine, heavy metals, and cancer causing chemicals that can damage developing The Link Between Vape Pens and Lung Cancer Disease Vapers May Be Less Likely to Undergo Lung Cancer Screening MedPage Today Psychiatry.org Vaping is Unhealthy. Tips and Resources to Help Quit. Vapes And Cancer New research from UNSW Sydney confirms vaping is likely to cause lung and oral cancer. The study shows these devices pose a direct risk, regardless of tobacco history.