Scripps Health E cigarettes remain the most commonly used tobacco product among middle and high school students in the United States, according to the Instagram The Truth about Vaping Caption: You might see flavor. Your body sees chemicals. Vapes can contain: Nicotine (highly addictive) Heavy metals (like lead) Harmful chemicals that can affect your lungs Just because it 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.