The devices, popular among teens, emit lead, nickel and antimony at concentrations that may exceed cancer and neurological risk thresholds. Vapes redesigned to avoid UK crackdown could lead to more waste, say critics Vaping The Guardian Vaping: High lead and nickel found in illegal vapes Protect your lungs the hidden dangers of vaping Lung Foundation Australia 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.