Vaping likely to cause cancer: new findings 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 E Cigarettes Vaping with Juul & Other Electronic Cigarettes E cigarette flavored pods induce inflammation, epithelial barrier dysfunction, and DNA damage in lung epithelial cells and monocytes Scientific Reports Smoking vs. Vaping: The Same Damage, Just Marketed Better! If your lungs could talk, they would tell you the harsh truth: Smoking and vaping both burn and damage your lungs, just differently.