Researchers Find Toxic Metals in E Cigarette's Johns Hopkins Bloomberg School of Public Health Disposable e cigarettes, popular among teens and young adults, are not as harmless as they may seem. Recent studies have revealed that these devices release toxic metals like lead, nickel, and antimony into If you don't vape, don't start. Most e cigarettes contain nicotine, which is highly addictive and harmful to your health, especially for teens, young adults and those who are pregnant. Learn more about Disposable vapes ban 'could lead to relapse in people trying to quit smoking' Vaping The Guardian