Chemical exposure Vaping versus smoking High Levels of Fruit flavored Chemicals in E cigarette Liquids 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. Vape Flavors and Vape Juice: What You Need to Know Johns Hopkins Medicine Comparison of Toxicities of Main Chemical Components of ENDS Vape with Download Scientific Diagram