JUUL Is Unsafe. We Want You to Know Why. Many vapes contain not only cancer causing chemicals and heavy metals, but also huge amounts of nicotine, making it easier than ever for younger people to get addicted. Protect your lung health and Vaping releases toxic chemicals, including heavy metals, as well as ultrafine particles that go deep into the lungs. These increase the risk of heart and lung disorders. FDA orders Juul e cigarettes off the market in the U.S. STAT